1　At first glance, a forest appears to be a haphazard collection of trees, shrubs, vines, and flowers.

A　random

B　total

C　graded

D　natural

2　Leaves are not distributed accidentally on a plant stem, but are arranged in a very precise way that assures them the maximum light.

A　dangerously

B　densely

C　randomly

D　linearly

3　Medieval cities grew rapidly when they had harbors nearby.

A　merchants

B　castles

C　suburbs

D　ports

4　Because of harsh weather conditions, more than a dozen states in the United States were declared disaster areas in 1977.

A　severe

B　bizarre

C　moist

D　improbable

5　The best olive oil is obtained from olives that are harvested just after they ripen and before they turn black.

A　preserved

B　squeezed

C　gathered

D　sorted

【答案】1A 2C 3D 4A 5C

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