①I think the door's locked, but I'll just go and make sure.

我觉得门已经锁上了,不过我还是看看才放心。

②First you must make sure ________ the time and place.

首先你必须弄清时间和地点。

③Be sure ________ ring and let us know you've got back safely.

一定要来个电话,让我们知道你已平安返回。

④What is he up to?

他在忙什么?

⑤Up to now, he ________ (finish) his work.

直到现在,他还没有完成他的工作。

⑥—Shall we have red wine or white?

—It's up ________ you!

——我们来点红酒还是白酒?

——你看着办吧!