21. Young people under 25 make up nearly 40 percent of the Chinese population, and they’ll soon be _____ the nation.
A. in charge of B. in the charge of C. in the form of D. in preparation for
22. —Do you need any help, Lucy?
—Yes. The job is ________ I could do myself.
A. rather than B. less than C. more than D. no more than
23. Many babies ___________ their days and nights at first, sleeping for a long time during the daytime and staying excited all night.
A. stay up B. mix up C. look up D. take up
24. The box in the corner of the room _____ a lot of things, some medical equipment _____.
A. contained; including B. contained; included
C. including; contained D. included; containing
