Television sometimes has a negative ______ on children.
A. affect
B. effect
C. perfect
D. defect
If I______ free, I _______ swimming.
A. was, will go
B. was, would go
C. were, would go
D. were, will go
Let us go shopping , _______?
A. shall we
B. will you
C. do you
D. do we
You must have been to the Great Wall,____________?
A. mustn’t you
B. haven’t you
C. aren’t you
D. must you