May I speak to your manager at four o’clock this afternoon?–I’m sorryHe ________ to a conference long before then

Five people won the “China’s Green Figure” award, a title ______ to ordinary people for their contributionsto environmental protection.

Do you know when ____ I miss him very much.—Don’t worry. I will tell you as soon as ____.

You must be careful when you swim the lake.

Didn’t you hear the rain last night — . I didn’t wake up until this morning.