It’ s suggested by experts that teenagers ____at least 30 minutes exercising, five times a week.
#87174
A
spend
B
to spend
C
spent
D
have spent
推荐题目
 If you______to her about it yesterday, you ______ what to do now. 
#86633
A
should have spoken; would know
B
spoke; would know
C
had spoken; would have known
D
had spoken; would know
 --- _____the bike be repaired by him?--- No, I’d rather he _____ it repaired.
#86727
A
Will…has
B
Shall … had
C
Should…have
D
Can…has