— Have you found your English book? — I am not sure ____ I could have left it.
#74058
A
whether
B
what
C
when
D
where
推荐题目
1. By nine o'clock, all the Olympic torch bearers had reached the top of Mount Qomolangma, ___________ appeared a rare rainbow soon. 2.
#74690
A
of which
B
on which
C
from which
D
above which
_____ surprised me most was to see so many people waiting for my arrival.
#67839
A
That
B
It
C
Which
D
What
This is the only one of the books on space ___.
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A
that has been written
B
that have been written
C
which have been written
D
which has been written
Not until he left home ______ to know _______ important the family was for him.
#68340
A
did he begin; what
B
had he begin; how
C
did he begin; how
D
had he begin; what