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We should protect the earth，         we will have no water to drink．
#58271
A
so
B
or
C
and
D
but
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_____do you like watching comedies?  Because they ’re funny.
#56313
A
What
B
How
C
Where
D
Why
You should study harder______ it is too late to catch up.
#55841
A
if
B
when
C
after
D
before
You should keep working hard __you have passed the exam.
#57092
A
if
B
because
C
even though
D
when
_______ sunny day it is! It’s really good to go out for a hiking.
#55395
A
What a
B
What
C
How a
D
How
The art club is for members only. You can’t go in ____ you are a member.
#58180
A
unless
B
because
C
if
D
though