[题目]Scientists thousands of chemicals before they decided on the right one in the end.A. tried out B. found outC. worked out D. turned out 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】Scientists ______ thousands of chemicals before they decided on the right one in the end.

A. tried out B. found out

C. worked out D. turned out

【答案】A

【解析】

试题分析：句意：科学家们实验使用了几千种化学物质才最后做出正确的决定。A. tried out实验； B. found out查明； C. worked out解决；制定出；锻炼； D. turned out结果是；根据句意故选A。

练习册系列答案

A. take B. move C. withdraw D. Draw

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A．turns up B．makes up C．saves up D．takes up

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增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1.每处错误及其修改均仅限一词；

2.只允许修改10处，多者（从第11处起）不计分。

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注意：词数不少于60。

(请务必将作文写在答题卡指定区域内)

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A. in turn B. in return C. in place D. in need

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增加: 在缺词处加一个漏字符号(/\),并在其下面写出该加的词。

删除: 把多余的词用斜线(\) 划掉。

修改: 在错的词下划一横线，并在该词下面写出修改后的词。

注意: 1.每处错误及其修改均仅限一词:

2.只允许修改10处，多者(从第11处起) 不计分。

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