–Look! A man is cutting a tree on the moon. --It ______ be true. The teacher said there is no air on the moon.
Not only the students but also the teacher __________ basketball.
Smoking is bad for your health. You’d better .
----It’s too late, I must go. ----It’s raining outside. Don’t leave ___________it stops.
News books _________ to our school last week.
Hangzhou and Anxi are widely _________ for the silk.