Question:
The teacher asked the students ...... they had seen the exhibition.
Athat
Bbut
Cuntil
Dif
Answer:
D. if
Explanation:
- That: This is used to introduce a clause, but not typically used for reported yes/no questions.
- But: This is a conjunction used to contrast statements and does not fit this context.
- Until: This is used to indicate a time period and is not appropriate here.
- If: This is used to introduce a reported yes/no question, which is the correct context here.