21.After the meeting, I ________ to write a report on our next term’s work.
A. set about B. made off with C. set out D. set off
22.______ of the truth of the report, he told his colleagues about it.
A. Convinced B. Convincing C. To convince D. Having convinced
23. The students of the music school study________.
A. music but also some other subjects
B. some other subjects as well as music
C. no subjects but music
D. neither music nor some other subjects
