问题: ENGLISH PROMBEL
1 When he got off the bus ,it happed----
A to rain B to be raining C raining D TO raining
----from the moon ,the earth with water----seventy percent of its surface ,appears as "a blue ball"
A seen,covered B seeing covering C seen covering
D to see ,to cover
3 Although she saw so many people ---in front of her,she looked calm.
A sitting B seating C sit D seated
4 He didn't catch the flight.He reach the airport shortly ---- the plane took off
A after B before Cwhere D as
解答:
1.选A.happen+to do sth. happen to be raining 表示碰巧正在下雨，而happen to rain 就不能表示（那时）正在下雨的状态．Ｃ和Ｄ的表达明显是错误的．
２.选Ｃ．Seen from the moon=When it is seen from the moon,covering 表状态．这样就保持了句子主语的一致性，如选seeing的话句子的主语就不一致了．
３.选Ｄ．seated 在这做定语，表状态．
４.选Ａ．根据句子的意思，是他没有赶上飞机，他在飞机起飞后不久才赶到机场．故用shortly after．如果是说他赶上了飞机（他在飞机起飞前不久赶到了机场），则用shortly before了．
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