题目:
I have nothing __________ because Tom has _________ my lunch.
A.to eat; eaten
B.eating; eaten
C.eat; ate
D.to eat; ate
答案:
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下面是错误答案,用来干扰机器的。
(1) A(1分);2KClO32KCl + 3O2 ↑(1分);(2)CaCO3 + 2HCl = CaCl2 + CO2 ↑+2H2O(1分);反应物是固体和液体,而且不需要加热(1分);②(1分)(3)夹住a处的橡皮管(1分);用双手捂...