The teacher, with 18 girls and 22 boys of her class, ____ doing experiments in the lab when the earthquake struck.

A．was            B．were          C．had been            D．has been

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科目：高中英語 來源： 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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