I’d like to go swimming _______ the water is too cold. 
#56703
A
if
B
for
C
unless
D
whether
推荐题目
Why ____________ enjoy Beijing opera with us?
#57628
A
not to
B
don’t
C
not
D
you don’t
It’s dangerous______a tree.
#58020
A
climbing,
B
going up
C
to climb
D
clim