问题补充：
适当形式填空（共5分）
【小题1】He promised his father that he (give) up smoking this year.
【小题2】I did what I can (help) my brother with his English study.
【小题3】The accident suddenly(happen) while the lights were changing to red.
【小题4】Everyone agreed that we should stop the factories (pour) the dirty water into the river.
【小题5】They think you’d better not (join) this club this year.would give
答案：
(答案→)would give
解析：
【小题1】句意：他对他的父亲承诺说今年他会戒烟。根据句意应该用过去将来时，故填would give。
【小题2】句意：我做了所有我能做的来帮助弟弟学英语。本句中to help 是一个目的状语。
【小题3】句意：在交通灯即将变红时，事故突然发生了。根据while 后的句子所用的时态我们可知本句应用过去时，故填过去式形式。
【小题4】句意：大家都同意我们应该阻止工厂把脏水倒入河流。stop sb./sth. from doing sth.阻止某人做某事或阻止某事发生。故用-ing 形式。
【小题5】句意：他们认为你今年最好不要参加这个俱乐部。had better do sth. 最好做某事。故用动词原形。
适当形式填空（共5分）【小题1】He promised his father that he (give) up smoking this year.【小题2】I did what
