(2014·河南豫北三校联考)________is well known to everyone，I should say，is that a man becomes learned by asking questions.
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A
Who
B
It
C
As
D
What
推荐题目
---Did you meet with the famous space hero, Yang Liwei?---_____ I had come here earlier.
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A
If only
B
Only if
C
But for
D
Despite
Tony decided to study abroad _______ he knew he would meet many difficulties.
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A
as if
B
because
C
unless
D
even if
The US army suffered a record 32 suicides in July 2011, the most it began publishing monthly figures in 2009.
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A
since
B
when
C
while
D
though
_____ an ad does not lie, it does not mean it is altogether innocent.
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A
Even if
B
As if
C
If
D
Now that