33．— We should recycle everything we can．
— Absolutely．These may seem little things，but they’re not__________it comes to saving the
environment．
| A．since | B．when | C．while | D．As |
Not that I’m unwilling to lend you a hand ,I’m too busy for the moment .
| A．because | B．but that | C．but | D．however |
Jack had traveled six miles across the Channel _____his engine failed and was forced to land on the sea .
| A．when | B．until | C．after | D．since |
—When did he leave the classroom?
—He leftyou turned back to write on the blackboard.
| A．the minute | B．the time | C．until | D．before |
he thought he was helping us with the work, he was actually in the way.
| A．Although | B．Unless | C．Because | D．When |
Hearing his words ,I couldn’t decide or remain .
| A．whether to go abroad | B．if I go abroad |
| C．if to go abroad | D．to go abroad |