---______ can we warn people not to swim here?
---By putting up signs.
A. How B. Why C. Where
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 |
My life _____ a lot_____ than it is now .
| A．will be; good | B．is ; better | C．will be; good | D．will be ; better |