Frank often wears a mask _____ he can keep fit in the foggy and hazy (霾) weather.
#55316
A
only if
B
until
C
so that
D
even though
推荐题目
I still remember my first teacher we haven’t seen each other for many years
#55278
A
for
B
because
C
since
D
though
Yunnan is colorful millions of people come to enjoy themselves every year.
#56941
A
too…to
B
so…that
C
not…until
D
so…but
“You can’t have your football back______you promise not to kick it at the window again!” the old lady said angrily.
#57715
A
because
B
since
C
when
D
unless
