21. — Do you think he will come at this weekend?
— ___________, because he has an important party to attend.
A. I don’t believe B. I don’t believe it C. I believe not so D. I believe not
22.She was so sad because she failed in the maths test. Let’s ______ her _______.
A. leave … behind B. leave … alone C. leave … aside D. leave … out
