you turn off all the lights when you leave the classroom．
#96287
A
Making sure
B
To make sure
C
Being sure
D
Make sure
推荐题目
____ in a key university is almost every high school student’s wish.
#91267
A
Educating
B
To educate
C
Educated
D
Being educated
Advertisements _______ these facts have been printed in newspapers and magazines but have not helped much.
#96120
A
based on
B
base on
C
to base on
D
basing on
Studies show the electronic devices people have made much use of music may be causing hearing loss in many people.
#98879
A
enjoy
B
to enjoy
C
enjoying
D
enjoyed
Nobody enjoys ______.
#98241
A
being looked down upon
B
looking down upon
C
being looked down
D
to look down