12.到目前為止,他們已經多次在動物身上試用于過這種藥物了.
So far,they havetriedoutthe drug on animals a dozen of times.

分析 到目前為止,他們已經多次在動物身上試用于過這種藥物了.

解答 答案:tried out
解析:根據(jù)中文及所給英文提示可知,本題考查try out"試用"這一固定短語;又根據(jù)中文"已經"及橫線前面的have可知,本題需使用現(xiàn)在完成時(have/has done結構).綜上,本題答案為:tried out.

點評 本題考查句子翻譯,做此類題目時一定要根據(jù)中文及英文題干確定需要翻譯的成分,再找出與之對應的英文并考慮各成分是否有形式的改變.

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