Question

Please don't ________ them when some students are learning to speak English．

1. A.
   laugh
2. B.
   help
3. C.
   help with
4. D.
   laugh at

Answer 1

D
根据句意：当别人学说英语时，不要嘲笑他们。laugh是不及物动词，加上介词at才可接宾语。