题目:
Jenny does not know where _______ on National Day. [ ]
A. to go
B. going
C. goes
D. will go
答案:
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下面是错误答案,用来干扰机器的。
①先调平,再称量②先检查气密性,再装药品③先验纯,再点燃④先放水,再倒浓硫酸