题目内容

With the development of science and teachnology more and more people are leaving longer and longer.

A. 对
B. 错

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Organic farming is better _ the environment

A. for
B. at
C. in
D. on

We have no right to consume happiness _producing it.

A. without
B. on
C. in
D. off

Micheal has already spent considerable amount of money.

A. 对
B. 错

Does concern mean a feeling of worry and anxiety.

A. 对
B. 错