题目内容：

动词考查(共5分)

1.What _____ they _____ at this time yesterday ?

A. did; do         B. are; doing

C. were; doing    D.do; do

2.Look! The baby _________   (lie) on the bed.

A.was lieing       B.is lieing

C.was lying        D.is lying

3.He didn’t finish ____________the room.

A. clean   B. cleaned  C. cleaning  D. cleans

4.As teenagers, we are old enough ___ with housework.

A.to help         B. helping     C. help        D.helped

5.My mom ____ happy if she ____ the mess in the house.

A.will be;sees    B. is;see

C. won’t;see     D.won’t be;sees