Bad luck! It’s too late.—It doesn’t matter. The concertfor only a few minutes. You can’t miss it.

It _____ last week that the haze(雾霾)in Beijing caused many problems.

After reading for an hour, you’d better_______ the green trees for a minute or two.

It’s windy outside. Could you please close the windows to the cold?

A naval parade can provide a platform, _____ navies on behalf of different nations can communicate．