19.The children are often asked __B____loudly in the library.
They must keep quiet.
ask sb not to do sth要求某人不要做某事
20.The teacher told Xiao Ming __B______late for school again.
A.not to be B.not be
C.don’t be C.not to
21.There is going to __A____an important meeting tomorrow.
Please try _______late.
A.have; not to be B.have; not be
C.be; not to be D.be; not be
22.The teacher often tells Jim and John ___A___too much time playing video games.
A.not to spend B.to not spend
C.don’t spend D.doesn’t spend
三、“疑问词+动词不定式”结构的用法
23.Could you show me __A______a bike?
A.how to mend B.what to buy
C.where to go D.how many to buy
24.---You want the green one or the yellow one?
---I have no idea.I can’t decide __C___.
A.to buy what B.how much to pay
C.which to choose D.how many to take
25.My car was broken and I didn’t know ____A___to do.
A.what B.which C.when D.how
26.---What did he do just now?
---He told me __B____.
A.how the machine to start B.the machine how to start
B.how to start the machine D.the machine to start how