(2013·高考新课标全国卷Ⅰ)There’s no way of knowing why one man makes an important discovery________another man，also intelligent，fails.
#30672
A
since
B
if
C
as
D
while
推荐题目
Peter was so excited _________ he received an invitation from his friend to visit Foshan.
#31541
A
where
B
that
C
why
D
when
The place was flooded ________ it had been raining for several weeks.
#33744
A
because
B
because of
C
ever since
D
as a result of
Some people have the idea_____ you can cross Canada in less than five days.
#31959
A
what
B
that
C
which
D
when
We had just covered a distance of three miles the engine and the car came to a stop
#32692
A
then; was broken
B
when; broke down
C
until; was failed
D
since; burst out