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
