单项选择题
Friendship helps us understand ______ we are, ______ we need each other and ______ we can do for each other.
A. what
when
that
B. who
why
what
C. where
why
that
D. who
when
how much
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单项选择题
—Mum, it is nice weather. I want to skate this afternoon. —Don't you think the ice on the lake is too thin to ______ your weight
A. stand
B. bear
C. catch
D. take
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单项选择题
One day Chuck is on a flight ______ the Pacific Ocean suddenly ______ his plane crashed.
A. through
while
B. through
when
C. across
when
D. across
while
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