The teachers may use these exercise as part of class work or home . A. requirement B. assig——青夏教育精英家教网—

摘要：The teachers may use these exercise as part of class work or home . A. requirement B. assignment C. appointment D. entertainment

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.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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