23．It's very difficult ____ the old woman ____ skate.

　A．of; do

　B．to; make

　C．for; to

　D．by; on

22．The policeman asked the boys ____ there.

　A．don't stay

　B．didn't stay

　C．not to stay

　D．to never stay

21．Father promised(答应) ____ _a new pair of glasses for me.

　A．buy

　B．bought

　C．to buy

　D．buying

20．Mr Smith asked the man ____ the queue.

　A．not jump

　B．didn't jump

　C．not to jump

　D．to not jump

19．Remember ____ late for class again.

　A．not to

　B．not to be C．to be not

　D．be not to

18．He went home ____ some books.

　A．got

　B．getting

　C．get

　D．to get

17．Please give me a pen ____ .

　A．to write

　B．writing

　C．to write with

　D．written

16．I don't know ____ .

　A．when start

　B．when to start

　C．to how start

　D．how start

15．Could you tell me ____ this word?

　A．to how read

　B．how to read

　C．how read

　D．how read to

14．Our teachers told us ____ hard.

　A．to work

　B．working

　C．worked

　D．work