-Do you know the boy________ is sitting next to Peter?-Yes. He is Peter's friend. They are celebrating his ________ birthday.
#31722
A
who; ninth
B
that; nineth
C
/; nineth
D
which; ninth
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—How can I wake up that early? —Set the alarm at 3 o’clock, ________ you’ll make it.
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A
but
B
or
C
and
D
so
—How long has John been here? — Two years, _______ he still has no friends.
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A
and
B
so
C
but
D
or
_____more countries can use natural energy in the future remains to be seen.
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A
Whether
B
This
C
who
D
If
________ unemployment and crime are high，it can be assumed that the latter is due to the former.
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A
Before
B
Where
C
Unless
D
Until
He’s got himself into a dangerous situation______he is likely to lose control over the plane.
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A
where
B
which
C
while
D
why