— Who is the man over there? Is it Mr. Wu?
— It ________ him, but I am not quite sure.
| A．may be | B．maybe | C．is | D．must be |
The citizens in Shanghai _______________ the highest building, Shanghai Tower, in the near future.
| A．is going to see | B．will see | C．sees | D．see |
The suspect admitted _______________ the chemical in the lab before he killed his roommate.
| A．to steal | B．stealing | C．stole | D．steal |
Mr. White always expected his son _______________ an active part in the classes.
| A．taking | B．take | C．takes | D．to take |
–_______________ does a CRH train run? –It runs up to more than 300 km an hour.
| A．How long | B．How far | C．How fast | D．How soon |
You shouldn’t keep a pet _______________ you have enough time to care for it.
| A．if | B．unless | C．though | D．when |