Frank often wears a mask ________he can keep fit in the foggy and hazy (霾) weather.
#55993
A
only if
B
until
C
so that
D
even though
推荐题目
—Look! Lily and Sally are cleaning the school laboratory.—Let’s go and join them. .
#55123
A
Many hands make light work
B
The early bird catches the worm
C
A friend in need is a friend indeed
D
The grass is always greener on the other side
---I don’t have a tennis racket, _____my brother has one. --- Let’s go to find him.
#56149
A
and
B
or
C
but
D
so
