He will come to understand your efforts sooner or later. It's just a matter of_______.
| A．time | B．value |
| C．luck | D．fact |
Sorry, he _____ help his mother.
| A．had to | B．has | C．has to | D．have to |
Do you go to school ______ bike or _____ foot?
| A．by; by | B．on ;on | C．by; on | D．on; by |
Mr. Wang is leaving ________ Beijing next month.
| A．to | B．with | C．in | D．for |
He is very serious. No one can make him___.
| A．laugh | B．laughs | C．to laugh | D．laughing |
My best friend is good___ swimming, but I do well ________running.
| A．at; in | B．in ; at | C．at; at | D．in; in |