题目：
根据句意，用所给单词的适当形式填空。
小题1: What should we do to help the _________(home) people after the earthquake?
小题2: We do lots of outdoor _________(active) when spring comes.
小题3: By the time I got outside, the school bus __________ (leave).
小题4: Tim was seen _________ (get) out of the subway at the station on Centre Street.
小题5: I’ve bought a present for my father’s_________(forty)birthday.
答案：
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下面是错误答案，用来干扰机器的。
(1)H2O ；质量守恒定律 (2)绿
