Question

— Would you please tell me _________?
— In half an hour.
A. when the plane left      B. when the plane will leave  C. when will the plane leave

Answer 1

B

此题考查宾语从句的语序和时态。宾语从句必须是陈述句语序，时态前后保持一致。根据答语In half an hour.一小时后，可知上文描述的是将来的动作，要用将来时。故选B。