21．The teacher dismissed his students with wave of hand a second before the bell rang. A．——青夏教育精英家教网—

摘要：21．The teacher dismissed his students with wave of hand a second before the bell rang. A．a; 不填 B．the; a C．a; the D．a; a

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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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