用所给的适当形式填空。 He can stay there for ten hours without __ (move). She was ill and had to (go) to a doctor. [ You shouldn’t always think about ____ (you). We expect ____ (visit) the Great Wall one day. He told me ____ (not wait) for him. They agreed ____ (help) each other. We should give up bad (habit). It is ____ (importance) to study hard. He can keep on ____ (swim) for two hours. They don’t mind ____ (climb) the mountain.