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— Have you found your English book? — I am not sure ____ I could have left it.
#74058
A
whether
B
what
C
when
D
where
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My parents used ________they had to get a new car for my brother.
#72582
A
which
B
all what
C
what
D
不填
—Tire patient looks much better．_____ is it that has made him _____ he is today?—Perhaps the special medicine and his family’s patient care．
#69265
A
What; that
B
That; that
C
What; what
D
What; which
(2013·高考山东卷)Mark needs to learn Chinese ________ his company is opening a branch in Beijing.
#67416
A
unless
B
until
C
although
D
since
As we all know , reading is to the mind______  food is to the body.
#69783
A
that
B
what
C
as
D
where
 The Voice of China has set up a big stage for young people with a talent for music, ________ some of them have stood out among others.
#66793
A
which
B
when
C
who
D
where