Europe has achieved more in controlling the AIDS virus than Asia in the past ten years, _______the number people infected with the virus is going up sharply.
#72269
A
when
B
that
C
which
D
where
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______ difficult the problem was, he tried his best to solve it.
#68408
A
No matter
B
Although
C
Whatever
D
However
______, I believe, and you will find the student is very outgoing.
#68182
A
One talk with him
B
Given a talk with him
C
Having a talk with him
D
If you have a talk with him
________ is where he gets all his money from. 
#69169
A
What I can’t understand it
B
That I can’t understand
C
What I can’t understand
D
Which I can’t understand it