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
Yesterday morning I was just leaving_______ the telephone rang.
#55954
A
when
B
while
C
because
D
since
__________ Millie likes to go to the cinema, but she never sees horror films.
#57732
A
Since
B
As
C
Though
D
/
I will take a holiday with my family _______ I finish all the exams.
#56373
A
so that
B
as
C
as soon as
D
while