题目

I think I must watch TV now, Dad. I _________ which team will win the game.   A. don’t wait for know                                   B. can’t wait for knowing      C. don’t wait to know                                    D. can’t wait to know 答案:D 解析: 略1a+1-a+3a2-1×a2-2a+1(a+1)(a-3),其中a2+2a-1=0.
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