Question

---Please _______to return my book by Friday. I'll use it on Saturday.

---No, problem. I'll finish reading it on Thursday.

1. A.
   don't forget
2. B.
   not to forget
3. C.
   not forget
4. D.
   forget not to

Answer 1

A
祈使句的用法。由题意可知，这是一个否定的祈使句，故用“don't+动词原形”。