The hero said he didn"t think twice ______ diving into the freezing river to res

题型：模拟题难度：来源：

The hero said he didn"t think twice ______ diving into the freezing river to rescue that child.

[ ]

A. before
B. after
C. until
D. when

答案

举一反三

We need some more facts and figures _____ we make the final decision.

[ ]

A. since
B. before
C. after
D. until

题型：模拟题难度：| 查看答案

_____ registered, goods are not allowed to be sold in supermarkets.

[ ]

A. If
B. When
C. While
D. Unless

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— Do you know about "Tiger Mom"?
— Yes. Her children will never be praised _____ they have done everything she requires.

[ ]

A. after
B. unless
C. once
D. when

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In many European countries, one has to decide much earlier what one"s career is going to be, and there
is less freedom in changing one"s decision _____ one has chosen a particular path.

[ ]

A. once
B. before
C. until
D. as

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Children of all ages can learn a lot of things, such as road awareness and street safety skills, ____ they walk
without knowing.

[ ]

A. unless
B. as
C. as though
D. as soon as

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