【单选题】
Air is very important, _________ we cannot live any more.
①
without that
②
no which
③
where
④
without which
【单选题】
We could ask someone to do the work privately without it __________.
①
know
②
be known
③
being known
④
to be known
【单选题】
We looked for a table to sit down, but they were all ____.
①
reserved for
②
engaged in
③
used up
④
taken up
【单选题】
—I’m sorry to keep you waiting. —Oh, not at all. I___ here only a few minutes.
①
have been
②
had been
③
was
④
will be
【单选题】
17.I dont think we can finish all the work before Friday, ____we?
①
shall
②
will
③
can
④
do
【单选题】
_____the stress of examinations are over, we call all relax.
①
while
②
Even though
③
Now that
④
For