Without the sun’s light _____ the earth’s surface, it would be so cold that life could not exist on the earth.
A. warms
B. warmed
C. warming
D. to warm
A. warms
B. warmed
C. warming
D. to warm
【答案】
A. warms
B. warmed
C. warming
D. to warm
A. warms
B. warmed
C. warming
D. to warm
【答案】
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