Tommy ，don’t play a joke _____ the little boy ， he is very shy

A. at      B. on        C. to       D. for

The roots of a plant grow _________the stem.

A. at the top of     B. in the bottom of

C. in the middle of  D. at the beginning of

The man decided ______ the house _______the window.

A. enter； by           B. to enter； through

C. entering； through   D. to enter； with

It is important       us       each other.

A. with； to help      B. with； help

C. for； to help       D. for； to help

Nothing can stop Tommy _______ hard

A. to work      B. with working

C. of working   D. from working

We should learn to look after ourselves. Don’t _______our parents too much.

A. work on      B. try on      C. pass on     D. depend on

Tommy has a pen，           ?

A. hasn’t he    B. isn’t he

C. doesn’t he   D. wasn’t he

The Chinese Dream _______true if everyone works hard enough.

A. come       B. comes        C. will come      D. came

I’m busy now. I have ______to do.

A. anything important    B. something important

C. important anything    D. important something

       students in our class is 50.

A. A number of    B. The number of

C. A lot of       D. Many of