21.He spent too much time talking onphone while we were all busy atwork..
A. the; / B. a; / C. / ; / D. the; the
22.—How can I use this washing machine?
—Well, just refer to the.
A. explanations B. expressions C. introductions D. directions
23. The customer didn’t chooseof the coats and went away without looking at a third one.
A. both B. all C. any D. either
24. There were two boys in the lab,did the experiment successfully.
A. the clever of whom B. the cleverer of whom
C. the clever of them D. the more clever of them
25. You can put the medicineyou like, on condition that the children can’t reach it.
A. in which B. wherever C. the place D. the place where