-- Is that girl Susan?
-- It ______ be her. She left for Beijing yesterday.
A. needn't B. can't C. mustn't
Only when the work is done ______be able to go back home.
| A．you have | B．you will | C．will you | D．have you |
__________ should not be allowed to go out alone at night.
| A．Twelve-year- old | B．Twelve-year- olds | C．Twelve year old | D．Twelve years old |
—I think teenagers should _______ to drive. They are not serious enough.
| A．be allowed to | B．not be allowed to | C．not allow to | D．allow to |
I fell down and broke three of my teeth. I wonder how many times I have to come here to get my broken teeth _______.
| A．fix | B．fixing | C．fixed | D．to fix |
—What do you usually do in the morning?
－ I often practice__________ English.
| A．speak | B．to speak | C．speaking | D．spoke |