--- What’s wrong with your car?
----It has a tyre.
| A．spare | B．normal | C．smooth | D．flat |
I was glad to meet Jenny again，__________ I didn't want to spend all day with her.
| A．but | B．and | C．so | D．or |
__________ he promised that he wouldn't be late, he didn't arrive until the end of the party.
| A．Since | B．Although |
| C．Because | D．Until |
Jerry has promised to keep the secret, so he won't tell anyone __________ asked to.
| A．until | B．now that |
| C．unless | D．even though |
Playing on a frozen sports field sounds like a lot of fun. Isn't it rather risky，__________？
| A．though | B．also |
| C．either | D．too |
Hot __________ the night air was, we slept deeply because we were so tired after the long journey.
| A．although | B．as |
| C．while | D．however |