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题目
the flu is considered____by viruses which are likely to reproduce in the cells inside the human nose and throat
causing
being caused
to be caused
to have caused

提问时间:2021-01-02

答案
to be causedconsider有两个用法.表示考虑的时候是consider doing表示认为的时候是consider sth to be,所以这里是sth is considered to be caused by virus下面的which are likely to reproduce in the cells inside...
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