My friend is ______her sister.
| A．babysitting | B．babysits | C．babysiting | D．to babysit |
She________ know the answer, but I'm not sure.
| A．maybe | B．may be | C．may | D．must |
Chinese________ by the largest number of people.
| A．is speaking | B．speak |
| C．speaks | D．is spoken |
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