Question

The teacher told us ________ clean the classroom.

1. A.
   forgot to
2. B.
   not forgot to
3. C.
   not to forget to
4. D.
   no to forgot to

Answer 1

C
解析：
本题考查动词tell的用法。tell sb to do sth意为“告诉某人做某事”，其否定形式tell sb not to do sth“告诉某人别做某事”，do的形式与句中时态无关，故选C。