________ is known to us, May 12, 2008 was the day _______ Wenchuan earthquake happened.
| A．Which; on which | B．It; when |
| C．As; which | D．As; when |
There was plenty of time. She ______ .
| A．mustn’t have hurried | B．couldn’t have hurried | C．must not hurry | D．needn’t have hurried. |
—Would you permit me ___________ here?
— Sorry. We don’t permit ___________ in the lab.
| A．smoking; smoking | B．to smoke; to smoke |
| C．smoking; to smoke | D．to smoke; smoking |
I’ve taken someone else’s green sweater by mistakes. It ______ Harry’s. He always wears green..
| A．could be | B．will be | C．mustn’t be | D．has to be |
_____ means to do what you promised.
| A．Keeping your words | B．Giving your word | C．To keep your word | D．To have words |
It is our ______ to enjoy the moon on Mid-Autumn night.
| A．habit | B．custom | C．hobby | D．rule |