“___________ race” means that two people form a group with their on-leg tied and they will walk for contest with three legs.
| A．three-legging | B．three-legged |
| C．three-legs | D．three-leg |
Remember, Peter, when you learned to drive a car? ______ you drove more, you got better and better. It’s the same with Chinese study.
| A．Although | B．While | C．As | D．Unless |
It used to ______ that humans and animals were different and had little in common.
| A．believing | B．be believed | C．believe | D．believed |
The day breaks, _______ the birds are singing.
| A．for | B．because | C．since | D．As soon as |
________, I attended the meeting instead of him last week.
| A．He was ill | B．His being ill |
| C．He being ill | D．Him being ill |
When you read the book, you’d better make a mark ______ you have questions.
| A．at which | B．at where | C．the place where | D．where |