單項(xiàng)選擇題The importer will submit references if these () given in the preliminary negotiations.

A.are not
B.had not been
C.has not been
D.were not


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1.單項(xiàng)選擇題Although () primarily to promote trade relations, these agreements also foster technological cooperation.

A.designed
B.they are to be designed
C.it is designed
D.they are being designed

3.單項(xiàng)選擇題I have received () professional training.

A.three-month
B.three-months
C.athree-month
D.three-month’s

4.單項(xiàng)選擇題I think your sister is old enough to know () to spend all her money on fancy goods.

A.better than
B.than
C.other than
D.rather than