—This physics problem is too difficult. Can you show me _____, Wang Li?
—Sure.
A.what to work it out
B.how to work it out
C.how to work out it
Now China has joined WTO（世贸组织）, so I think English is________ useful than before.
| A．more | B．most | C．much | D．many |
The more careful you are, themistakes you’ll make.
A. more B. few C. fewer
—How much is the computer?
—About three yuan.
A. thousand B. thousands of C. thousands
—do you go to a movie?
— Once a week.
A. How often B. How long C. How soon
— I usually go to school by bus.
— Why not going there on foot?
A. trying B. try C. to try