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 had lived in the Middle Ages，you ________the chance to appreciate the art works of Leonardo da Vinci.
#86606
A
won’t have had
B
wouldn’t have
C
wouldn’t have had
D
mustn’t have had
I hoped Tina _________ to my birthday party next Thursday.
#87628
A
to come
B
is coming
C
will come
D
was coming
--- How much shall I pay for the phone call? --- You ________. This is free of charge.
#87096
A
shouldn’t
B
can’t
C
don’t have to
D
mustn’t
Teachers suggested parents their children under 12 to ride bicycles to school for safety.
#87502
A
shouldn’t allow
B
don’t allow
C
mustn’t allow
D
couldn’t allow
25. I ______ have been more than six years old when the accident happened.
#90505
A
shouldn’t
B
couldn’t
C
mustn’t
D
needn’t