---Do you mind opening the window?the air inside is not so fresh.--- __________, Mr. Smith is taking a nap (小睡),don’t make him catch a cold.
I am afraid there’s ____________with the computer. Can you come and have a look?
What does Mr. Liu usually ___________when he is at school?
It’s not my blouse. It may be _______________.
Which of the following can NOT be used as subject?
How many students are born _________the star sign of Aquarius in your class?