） ––________must I take the medicine, doctor? –– Every six hours.
| A．How | B．How long |
| C．How often | D．When |
You will find ______ useful to learn even a little English.
| A．it | B．it was | C．that | D．this |
There are _______ people in Shanghai than in Wuxi.
| A．much more | B．many more | C．a little more | D．many |
A: Could you tell me when you will _______Tokyo?
B: I’m not sure. When I _______ I will call you.
| A．arrive ; reach | B．reach; get to | C．get to; arrive | D．reach; arrive at |
I don’t think this watch ______ as much as the one you ______ last time.______ last time.
| A．spends; paid | B．takes; spent | C．pays; cost | D．costs; paid for |
–Look at that girl! Is it Susan?
--No, it _______ be her. She went to her hometown just now.
| A．mustn’t | B．can’t | C．needn’t | D．wouldn’t |