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题目
1they have kept ()on this project for thrree years ( work )
2the children will climb the hill if it ( ) tomorrow A won,t rain B didn,t rain Cdoesn,t rain D isn,t raining 3Neither his father nor he ( ) the island A has been to Bhas gone to C have been to Dhave gone to

提问时间:2020-09-15

答案
1 working ( keep doing sth )
2 C ( if 引导的从句是主将从现
3 A ( 主语是三单,排除C; 而HAS GONE TO 人不在这里,去了某地了)
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