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