Some of the students are nearsighted______they spend too much time watching TV or playing online games. 
#55869
A
when
B
though
C
because
D
unless
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We can’t go to the mountain ________ the bad weather.
#55703
A
because
B
because of
C
although
D
so
 He was so tired that he fell asleep ___he went to bed.
#58470
A
as if
B
even though
C
ever since
D
as soon as