________ is often the case, we have worked out the production plan.
#73180
A
Which
B
When
C
What
D
As
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The river______ are covered with trees is polluted.
#74034
A
of which the banks
B
whose banks
C
the banks of which
D
A,B,C are right
Some researchers believe that there is no doubt___ a cure for AIDS will be found.
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A
which
B
that
C
what
D
whether
_______ you get on well with a number of people, you are usually friends with only a few .
#67648
A
Since
B
Where
C
Before
D
While
—The experiment is of particular importance. —I see. We will carry on with it ________ we can get enough money.
#72812
A
unless
B
though
C
whether
D
until