Question

each person in the group will play an important ________ in the project.
the test had a ________ of short - answer questions.
the private ________ of the economy is suffering right now.
the strip saw a ________ drop in visitors during the pandemic.
the twins had a very ________ appearance and were difficult to tell apart.
my hours were cut at work, so i needed to find a second ________ of income.
the recipe had very ________ instructions and was very easy to follow.
the fire damaged the ________ so badly that it was unsafe to enter the area.
charles darwin is known for the ________ of evolution.
to improve his health, he tried to ________ his diet by eating more fruits and vegetables.

Explanation:

• "play an important role" is a common collocation, meaning to have a significant part or function.
• "a section of" indicates a part or segment, here referring to a part of the test.
• "private sector" is a well - known economic term.
• "significant drop" means a notable decrease.
• "similar appearance" describes having alike looks.
• "source of income" is a standard expression for where income comes from.
• "specific instructions" means clear and detailed directions.
• "structure" can refer to the physical form or framework damaged by fire.
• "theory of evolution" is Darwin's famous contribution.
• "vary" means to make changes or diversify, here in the context of the diet.

Answer:

1. role
2. section
3. sector
4. significant
5. similar
6. source
7. specific
8. structure
9. theory
10. vary