Question

1. yo ______ al profesor de ciencias. * 1 point

○ sé
○ conozco

1. yo ______ jugar ajedrez. * 1 point

○ sé
○ conozco

Explanation:

For question 1: "conocer" (conozco is the first - person singular present) is used to express acquaintance with a person. So "Yo conozco al profesor de ciencias" is correct as we are talking about knowing the science teacher (a person).

For question 2: "saber" (sé is the first - person singular present) is used to express knowledge of how to do something (in this case, how to play chess). So "Yo sé jugar ajedrez" is correct.

Answer:

1. B. conozco
2. A. sé

(Note: Assuming the first option for question 1 is "sé" and the second is "conozco", and for question 2 the first option is "sé" and the second is "conozco". If the option numbering is different, adjust accordingly. But based on the common usage of "saber" and "conocer", the answers are as above.)