例:It is generally considered unwise to give a child he or she wants.
A.however B.whatever C.whichever D.whenever
答案是B。
21.—I'm terribly sorry, Lucy.I've left your notebook at home.
—_____? I reminded you last night.
A.So what B.Why not C.How come D.What if
22.—You've finally figured out the puzzle!
—Yeah, in a complex way, _____.
A.too B.though C.either D.yet