On ______ the flight would be delayed, we made other arrangements.
| A．being informed | B．informed |
| C．informing | D．having informed |
3. 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 |
4. It used to ______ that humans and animals were different and had little in common.
| A．believing | B．be believed | C．believe | D．Believed |
5. The day breaks, _______ the birds are singing.
| A．for | B．because | C．since | D．As soon as |
6. _________, 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 |
7. 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 |