My brother is studying in ______ university in America; he wants to be ______ astronaut in the future.
| A．a; a | B．a; an | C．an; a | D．an; an |
_______ good for our health.
| A．Do exercise is | B．Doing exercise is | C．Do exercises are | D．Doing exercises are |
Chinese New Year usually comes January or February.
| A．at | B．in | C．on | D．by |
I can meet him the morning October 2nd.
| A．on; in | B．in; of | C．on; of | D．in; in |
---______ does she dance every day?
---For two hours.
| A．How many | B．How long | C．How soon | D．How often |
The Chinese enjoy _________ fireworks when some good things happen (发生) in their families.
| A．set off | B．letting off | C．set up | D．setting up |