—How do you plan to travel to Beijing, Jack?—I haven’t made up my mind ________to go by plane or not.
#55148
A
if
B
whether
C
when
D
how
推荐题目
The art club is for members only. You can’t go in _______ you are a member.
#56671
A
unless
B
because
C
if
D
though
John had to start work at an early age, ____ his family was very poor.
#56957
A
or
B
so
C
but
D
because