题目内容

To keep healthy, older people need to stay active. Remaining stagnant results in loss of strength and health.

A. inactive.
B. lively.
C. unhealthy.

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In formal communication, be sure to avoid ambiguous language. Clear language prevents confusion.

A. wordy.
B. ineffective.
C. unclear.

Being raised with conflicting values can be a detriment to boys’ and girls’ relationships with each other. In contrast, shared values can be a benefit.

A. improvement.
B. harm.
C. relationship.

While houses and antiques often increase in value, most things, such as cars and TVs, depreciate.

A. remain useful.
B. lose value.
C. break.

Reliable scientific theories are based not upon careless work, but rather upon meticulous research and experimentation.

A. hasty.
B. expensive.
C. careful.