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單項選擇題

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

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

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單項選擇題

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

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

單項選擇題

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

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