My sister is three years ______than I. She is _______young _____go to school.
| A．young; too; to | B．younger; enough; to |
| C．younger; too ;to | D．young; so; that |
I want to _______ kids_______ their school work.
| A．help; to | B．helping; with | C．help; with | D．helping; to |
Our teachers often tell us not _______ the street when the traffic light is red.
| A．cross | B．to cross | C．crossing | D．crossed |
A little girl told many funny stories to ______ them up.
A.clean B cheers C.cheer D.cleans
He only said it for _____, he didn’t really mean it .
| A．joy | B．fun | C．joke | D．thank |
It will take _____ years to make robots _____ the most unpleasant things .
| A．hundred ; to do | B．hundreds of ; to do |
| C．two hundreds; do | D．hundreds of ; do |