Giúp tui nhen ( kh ghi lại đề chỉ ghi đáp án)

21. The Library of Congress over 100 million books. D. works sick people. C. of A. contains B. have C. goes 22.The doctor takes care A. On В. in D. after 23. She puts her dirty clothes into the to wash. B. washing machine A. dryer С. tub D. electric stove. 24. What is he doing now? – H ...