The teacher explained the instructions _________ so that students could do the experiment accurately．

A．in reality              B．in vain             C．in detail                    D．a(chǎn)t random

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科目：高中英語(yǔ) 來(lái)源： 題型：

.The teache rfound ____ difficult to decide____ he would take with him to attend the

conference.

  A.it;whom        B.himself;who       C.this;whom      D.that;who

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