—Sorry, I’m late. Has the meeting begun?—It doesn’t matter. The meeting _______ for several minutes.

— Hurry up! We’ll be late for the plane.— Don’t worry. The plane won’t_______ until two hours later. 

 Our classroom is very dirty ,let’s _____it_______.

We have ________ vegetables, so we have to go and buy some this afternoon.

— Mr Li looks often looks tired and worried? — So he does. You see it’s not easy to           such a big factory.