单项选择题

______ energy which the sun radiates goes in every direction, and only ______ minute part of it falls on the earth.

A. The, a
B./, a
C./, the
D. The, /
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单项选择题
It suddenly ______ on me that I had turned to the wrong persons for help.
A. dawned
B. occurred
C. happened
D. hit
单项选择题
Jack was about to announce our plan but I ______.
A. put him through
B. turned him out
C. gave him up
D. cut him short
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