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單項(xiàng)選擇題

We have to point out that the postponement of the fulfilment of the contract（）caused us certain expenses.

A.had
B.have
C.has
D.having

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Everyone knows that China’s Bristles are of superior quality（）those from other countries.

A.with
B.to
C.for
D.than

單項(xiàng)選擇題

We shall do everything possible to assist you in（）a mutually beneficial trade.

A.developing
B.developed
C.develop
D.development

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