I’d like to go swimming _______ the water is too cold. 
#56703
A
if
B
for
C
unless
D
whether
推荐题目
 ---          is the pen?          --- It’s black        red.
#58444
A
What color; and
B
How color; and
C
What color; or
D
How color; or
__________he is ill, __________he goes to school. 
#56079
A
Although, but
B
/, /
C
Although, /
D
But, although