Question

You’ll have to wait ________ a while, as the doctor will finish the operation ________ a moment．

1. A.
   at; in
2. B.
   for; in
3. C.
   for; after
4. D.
   after; in

Answer 1

B
解析：
wait for a while意为“等一会儿”，表示动作持续；
in a moment意为“过一会儿后”，表示动作将要发生。