Tony decided to study abroad _______ he knew he would meet many difficulties.
#31529
A
as if
B
because
C
unless
D
even if
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The researchers found clear and convincing evidence ________ happiness is the key when it comes to better health and longer lives.
#32958
A
where
B
whether
C
how
D
that
_________ difficult and challenging the task may be, we must finish it on time, because there is a possibility _________we’ll be fired if we can’t fulfill the task on time．
#31669
A
Whatever; that
B
However; that
C
Whatever; which
D
However; as
(2013·高考天津卷)________ small，the company has about 1,000 buyers in over 30 countries.
#30667
A
As
B
If
C
Although
D
Once
_____ you understand the rules of the game, you will enjoy it.
#33361
A
Before
B
Even if
C
Once
D
While