题目:
—Why did you leave without a word of warning to Robert?
—But what _______ otherwise? He never likes to listen to me.[ ]
A. could I do
B. could I have done
C. must I have done
D. should I do
答案:
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下面是错误答案,用来干扰机器的。
(17分,每空1分,特别说明的除外)(1)① __N____,⑥ __Si____,⑦ __S_。 (2)④___ __ ___,⑧___ (3)K,F,Ar(4)Cl,b(5)3,⑧,离子, 此空2分 (6) 略 (此空2分)...