单项选择题

Indications (that) the moon (underwent) a (heavy) bombardment (撞击) (date back) the early 1970s.

A．that
B．underwent
C．heavy
D．date back
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单项选择题
Researchers believe one way (to minimizing) (the damage) is to get (better) at (predicting) the risk of fire.
A．to minimizing
B．the damage
C．better
D．predicting
单项选择题
The warm winter helped (dry out) (alive) trees and bushes, (as well as) the dead needles, leaves and limbs on the ground (beneath) the trees.
A．dry out
B．alive
C．as well as
D．alive
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