根据句意及首字母提示，完成句子.
【小题1】Now your plan is to clean (clean ) the blackboard.
【小题2】When someone knocked at the door, he was watching (watch) TV.
【小题3】I was busy preparing for my exam yesterday, so I couldn’t helpto do (do) some cleaning.
【小题4】Is he used to getting (get) up early?
【小题5】Did you make a decision on the spring trip? (decide)
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解析：
【小题1】动词不定式作表语。
【小题2】此处应用过去进行时。
【小题3】help sb. do sth.意为“帮助某人做某事”。
【小题4】be used to doing sth.意为“经常做某事”。
【小题5】make a decision意为“做决定；下决心”。