The teacher asked a second question ________ I could answer the first one．

The teacher asked a second question ________ I could answer the first one．

A.before

B.after

C.when

D.as

答案及解析： A

解析：

本句意为：“我还没来得及回答第一个问题，老师就又问了一个问题”。只有A项有“……才；

……就”的意思。