21. —I really don’t know when we can get over all the troubles.
— ______! Our troubles will soon be over.
A. Forget it B. Cheer up C. Neither do I D. What a pity
22．He, an average citizen, always thinks of_____ he can do more for the people．
A．how B．why C．what D．which
23. If you don’t go to the museum tomorrow, _____.
A. nor do I B. nor shall I C. I neither will D. either I will
