He will come here _______5:00 _________6:00this afternoon.

It’s hot here. Why not ________your coat?

Tony, play with the mobile phone while (当……时候) you’re walking in the street.

dioxide, which makes a ______ between us andthe sun, prevents heat from getting out of the atmosphere easily, so the earthis becoming warmer

The news____ they had won the game soon spread over the whole school. [ ]