--_______ pocket money do you usually get every month?
-- Fifty yuan. What about you?
| A．How often | B．How long |
| C．How many | D．How much |
—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 |
Eric is so careful that he always looks over his exercises to ________ there are no mistakes.
| A．make sure | B．find out | C．think of | D．look for |
Excuse me ,sir. You ______ open the door before the train stops.
| A．mustn’t | B．needn’t | C．may not | D．don’t have to |