Do you want to be healthy? ______. Smiling can help you stay healthy.
| A．Smile | B．Smiling | C．To smile | D．Smiled |
My parents________for fifteen years．
| A．married |
| B．got married |
| C．have married |
| D．have been married |
This math problem is as________as that one．I can’t work it out．
| A．difficult |
| B．more difficult |
| C．most difficult |
| D．the most difficult |
The boy likes to play tricks________the girls．So they don’t like him．
| A．with |
| B．as |
| C．to |
| D．on |
I waited for my friend for a long time at the bus station，but she didn’t________at last．
| A．show up |
| B．look up |
| C．think up |
| D．cheer up |
Please ask them________for the meeting next time．
| A．not be late |
| B．to not be late |
| C．don’t to be late |
| D．not to be late |