单项选择题

______ he arrived at the spot, he realized what had happened there.

A．The moment when
B．The moment
C．Until
D．At the moment
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A．qualityB．informativeC．importantD．popular
A．quality
B．informative
C．important
D．popular
单项选择题
A．enjoymentB．entertainmentC．contentD．opinion
A．enjoyment
B．entertainment
C．content
D．opinion
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