We’re expecting Jerry because he’s our _________ visitor who comes here for holiday every summer.
| A．familiar | B．regular | C．similar | D．popular |
-When did the computer crash?
-This morning, while I __________ the reading materials downloaded from some websites.
| A．have sorted | B．was sorting |
| C．am sorting | D．had sorted |
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 |