The workers had been ____ strike ____ almost a month. [ ]

We have sweaters ______ all colors ______ ￥50 each. [ ]

Look! A man is cutting a tree on the moon. –It ______ be true. The teacher said there is no air on the moon.

people in the world are suffering from the H1N1 flu.

Is there a sports meeting in your school?—Yes. It ______ in November every year.