---This Math problem isn’t easy for Jack to work out, is it? ---_______. He is far better at Math problems than we expected.
There is no living thing on _______ moon. A. the B. a C. 不填
–_______? –I like tennis and volleyball best
--Do you think the English class _______? --No, we all like it.
Don’t give me so many hamburgers. My _______ is enough.
This is _______room.