What ______ you ______ when you father came back?
#41367
A
did, do
B
are, doing
C
were, doing
D
do, do
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No sooner ___ down on bed ___ the telephone rang.
#67029
A
had he lain; than
B
had he lied; when
C
did he lie; than
D
had he laid; before
Taobao.com is a free site, _________ visitors can not just purchase almost all kinds of products but open their own online shops.
#72026
A
where
B
which
C
what
D
whose
The program is like a window on the world ____ you sit by it and fix your attention on what it shows.
#72151
A
if
B
as
C
while
D
unless
you may have, you should gather your courage to face the challenge.
#68062
A
However a serious problem
B
What a serious problem
C
However serious a problem
D
What serious a problem
.Who is the person ____is talking about the accident ___happened on Highway 104?
#71009
A
which, which
B
who, what
C
that, that
D
what, what