---- Could I take a few days’ leave, sir?----- I’m afraid you can’t ___________ the work is being done.
#31862
A
until
B
before
C
after
D
as
推荐题目
From space, the earth looks blue. This is ____about seventy-one percent of its surface is covered by water.
#30949
A
why
B
how
C
because
D
whether
_____ he thought he was helping us with the work, he was actually in the way．
#31504
A
Since
B
When
C
Because
D
If
Questions and exercises are given by the computer, which decides ______ to move the students ahead, review an easier level, ____ give more work on the same level.
#80118
A
either, or
B
both, and .
C
whether, or
D
not only, but also
Mr. Green has made another wonderful discovery, ______ great importance to science.
#34201
A
which I think is of
B
which I think it is of
C
that I think is of
D
I think which is of
My husband and I agree on _______ gets home first is to cook the supper.
#33886
A
who
B
whom
C
whoever
D
those who