Question

read each group of sentences carefully. in some sentences, the vocabulary word in bold is used correctly. choose only the correct sentences.
1.
the experts cannot explain the infallible drop in the amount of snow this year.
self - driving cars must be infallible before being allowed on the road.
drawing blood was once regarded as an infallible cure for many diseases.
it was infallible how much my dog loved to play fetch.
2.
harvest the enigma when its almost ripe.
much of what went on in the boys tree house was an enigma to his parents.
the enigmatic answer to two plus two is four.
the teachers enigmatic lecture left students feeling very unprepared for the test.
3.
the eagle made an ineffectual attempt to catch the mouse.
relying on old road maps is an ineffectual way to get where you need to go.
if what youre doing is ineffectual, my advice is to try something else.
the signing of the declaration of independence was an ineffectual date in american history.
4.
the chess player dissected every move his opponent made.
the science teacher dissected the frog while the biology students observed.
three students dissected that they wouldnt go to the party.
at the ballet recital, the conductor dissected her orchestra to begin playing.
5.
the actor in the movie tried to decipher out of the plane with a parachute.
during the war, code breakers were able to quickly decipher enemy messages.
karlas poor handwriting makes her letters hard to decipher.
experts can easily decipher the hieroglyphics on the walls of egyptian tombs.
6.
people are likely to vote for the candidate who seems most congenial.
smallpox was once congenial but is now under control.
my friends are a congenial bunch and we all get along really well.
going to a congenial school makes learning more fun.

Explanation:

Question 1:

• "infallible" means incapable of error. A drop in snow amount can't be "infallible" (first sentence wrong). Self - driving cars need to be error - free (infallible) to be on the road (second correct). Drawing blood as a "cure" doesn't relate to infallibility (third wrong). A dog's love to play fetch isn't an "infallible" thing (fourth wrong). So correct: Self - driving cars must be infallible before being allowed on the road.

Question 2:

• "enigma" is a mystery. Harvesting an "enigma" (first sentence) is wrong. The boy's tree - house activities being a mystery to parents (second correct). The answer to 2 + 2 is not an enigma (third wrong). An "enigmatic" (mysterious) lecture leaving students unprepared (fourth correct). So correct: Much of what went on in the boy's tree house was an enigma to his parents; The teacher's enigmatic lecture left students feeling very unprepared for the test.

Question 3:

• "ineffectual" means not producing the desired effect. The eagle's attempt to catch a mouse (eagles usually catch small animals, so "ineffectual" is wrong here). Relying on old road maps is not effective (second correct). If what you do is not effective, try something else (third correct). The signing of the Declaration of Independence is a significant, not ineffectual, date (fourth wrong). So correct: Relying on old road maps is an ineffectual way to get where you need to go; If what you're doing is ineffectual, my advice is to try something else.

Question 4:

• "dissect" means to analyze (for moves) or to cut apart (for a frog). The chess player analyzing opponent's moves (first correct). The science teacher cutting the frog (second correct). Students "dissecting" that they won't go to a party is wrong usage. A conductor doesn't "dissect" an orchestra (fourth wrong). So correct: The chess player dissected every move his opponent made; The science teacher dissected the frog while the biology students observed.

Question 5:

• "decipher" means to interpret or understand. Trying to "decipher" out of a plane (first wrong). Code breakers deciphering enemy messages (second correct). Karla's handwriting is hard to interpret (third correct). Experts deciphering hieroglyphics (fourth correct). So correct: During the war, code breakers were able to quickly decipher enemy messages; Karla's poor handwriting makes her letters hard to decipher; Experts can easily decipher the hieroglyphics on the walls of Egyptian tombs.

Question 6:

• "congenial" means pleasant, friendly. People vote for congenial candidates (first correct). Smallpox can't be "congenial" (second wrong). Friends being a pleasant bunch (third correct). A school being pleasant (congenial) (fourth correct). So correct: People are likely to vote for the candidate who seems most congenial; My friends are a congenial bunch and we all get along really well; Going to a congenial school makes learning more fun.

Answer:

1. Self - driving cars must be infallible before being allowed on the road.
2. Much of what went on in the boy's tree house was an enigma to his parents; The teacher's enigmatic lecture left students feeling very unprepared for the test.
3. Relying on old road maps is an ineffectual way to get where you need to go; If what you're doing is ineffectual, my advice is to try something else.
4. The chess player dissected every move his opponent made; The science teacher dissected the frog while the biology students observed.
5. During the war, code breakers were able to quickly decipher enemy messages; Karla's poor handwriting makes her letters hard to decipher; Experts can easily decipher the hieroglyphics on the walls of Egyptian tombs.
6. People are likely to vote for the candidate who seems most congenial; My friends are a congenial bunch and we all get along really well; Going to a congenial school makes learning more fun.