Question

6.  ( 2014四川资阳乐至模拟) 一Don’t forget       the classroom tomorrow afternoon.

——Thanks.I won’t.

   A. to keep clean   B. cleaning

   C. sweeping   D. to clean up

Answer 1

6.D forget to do sth.意为“忘记要去做某事”，排除B、C两项； keep clean保持清洁，其后不跟宾语;clean up清理，打扫。故 选D。