--- What do you think of the math problem ?
--- It’s very hard and nobody has _______.
| A．put it out | B．helped it out | C．worked it out | D．solve |
--- Do you know much about the city?
--- Yes, I ___________ there three times.
| A．was | B．have gone | C．went | D．have been |
Why not ______ your teacher for advice when you don’t know ______ the problems?
| A．ask; what to do with | B．to ask; how to deal with |
| C．ask; what to deal with | D．to ask; how to do with |
--- Didn’t your brother ________ go to school by bike?
--- Yes, he did. But he ________ walking to school now.
| A．used to; used to | B．use to; used to | C．used to; is used to | D．use to; is used to |
You don’t know _____ I want to see you again. It’s a year since I last saw you.
| A．how soon | B．how long | C．how often | D．how much |
With the help of the Internet, news can _______ every corner of the world.
| A．get | B．arrive | C．reach | D．return |