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题目
1 mary had prepareed carefully for her biology eaxmination so that she could be sure of passing it on he fist[ ]1.intention 2.attempt 3.purpose 4.desire 第2道.[ ] ,the conference started.1.having taken their seats 2 haven taken their places

提问时间:2021-03-22

答案
2,玛丽很仔细的准备生物考试,这样才能确保第一次尝试就过.根据意思选2
2,排除法,后面主语是conference,所以前面不能用ing,用ing就表示the conference坐下了
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