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问题: 单选问题?

1 The air has leaked out of his football.Could you get it ____up?
为什末是blown
2 -Could you meet me at the air port?
-I'd like to ,but I ______Shanghai when you return.
为什末是will have left
3 The car burns more fuel ,but _____all things into consideration ,it's still a good car.
为什末是taking
4 I was very sleepy . I tried ____my eyes open but I could't .
为什末是to keep

解答:

1. blown up 是指把气球吹起来,这里要用过去分词,表示状态。
2.will have left 是将来完成,表示,到那时我已经离开上海。
3.taking all things into consideration, 是综合考虑所有的条件,它是辆好车,take into consideration是固定搭配。用分词, 是因为,在这里,but taking all things into consideration 是状语,表原因!
4.to keep 是动词不定式! keep my eyes open 是保持我的眼睁着!