girls are not doing fine atschool, are they—______________

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

Did you watch the basketball match yesterday— Yes， I did. You know， my brother __________ in the match.

Under no circumstances, he was warned, _____ to give the password to someone else

My grandfather is ill today. —_________