You can’t get in. The exam _________ for over 30 minutes.
| A．has been on | B．has begun | C．began | D．has started |
Only ___________ the students exercise for more than half an hour every day.
| A．five percent | B．five percents |
| C．five percent of | D．five percents of |
My parents love me ___________ they don’t have much time to stay with me.
| A．although | B．however | C．so | D．because |
It’s important ___________ all of us ___________ English loudly in the morning.
| A．for; reading | B．to; reading |
| C．of; to read | D．for; to read |
After the vacation, I’m ___________ heavier than before.
| A．a few | B．a little | C．more | D．very |
—___________ does your sister go to the movies？
—Once a month.
| A．How long | B．How soon |
| C．How much | D．How often |