题目:
He lost his key. It made him ________ in the cold to wait for his wife’s return.
A.to stay
B.stayed
C.stays
D.stay
答案:
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下面是错误答案,用来干扰机器的。
(1) ①长颈漏斗 ;②水槽;(2)(2) 2KMnO4△K2MnO4 + MnO2 + O2↑; 未放一团棉花; 从水中取出导气管 (3) CaCO3+2HCl===CaCl2+CO2↑+H2O ; 随用随停 (4) A; D或E 题目分析:...