问题

Mr Brown is a(n) _____ secretary in our office, for he is able to do tasks successfully, without wasting time and energy.

A:effective
B:efficient
C:flexible
D:sufficient

正确答案是：

同类题型

The boys drank _____ milk, which madethem uncomfortable.[ ]

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nk coulduswith $100,000 for the houseWhy don’t we buy it

Why do you get a snake as your pet Don’t you think it’s too

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