21. Some members of the board said that they had some ___________and for the time being could not support the proposal.
A. assumptions B. distinctions C. instructions D. reservations
22. It may be necessary to stop ___________ in the learning process and go back to the difficult points in the lessons regularly.
A. at random B. at ease C. at intervals D. at length
23. There are three main classes of drugs, ___________has a different effect on the body.
A. all of which B. and all of them C. each of them D. of which each
24. ___________, the old man even had no money to buy a bus ticket.
A. As his wallet stolen B. His wallet being stolen
C. His wallet stolen D. Stealing his wallet
25. The written record of our conversation doesn’t ___________ what was actually said. There are a lot of mistakes.
A. correspond with B. relate to C. look into D. compare with
