The three backpackers finally reached the top of Mount Huangshan, ________ they could enjoy the breathtaking sights to their heart's content.
#75309
A
when
B
where
C
why
D
how
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The old man had one son and two daughters,     treated him well,     made him very sad.
#76918
A
neither of whom; that
B
neither of them; which
C
none of whom; which
D
none of them; which
The children, ______ had played the whole day long, were worn out.
#76279
A
all of what
B
all of which
C
all of them
D
all of whom