21. It is because of you______I was blamed by my teacher.
A. because B. since C. which D. that
22. They soon _____ doing the same thing day after day, and finally gave up.
A. got tired of B. got along with C. got away from D. got down to
23. It is requested that the meeting ______ postponed.
A. be B. can be C. may be D. shall be
24. The worker wrote down the weight of each stone and then _____ all the weights.
A. added to B. added up to C. added in D. added up
