Better _____ all the lights are turned off before you leave the classroom.
#97559
A
to be sure
B
to make sure
C
be sure
D
make sure
推荐题目
 ________ requires us to do two things quickly. First, ________  the main topic; and second, to write down the important details.
#88803
A
To take good notes; recognizing
B
Taken good notes; recognizing
C
Taking good notes; recognizing
D
Taking good notes; to recognize
The _______ boy was last seen _______ near the East Lake.
#93919
A
missing; playing
B
missing; play
C
missed; played
D
missed; to play
______ late in the morning, Bob turned off the alarm.
#98804
A
To sleep
B
Sleeping
C
Sleep
D
Having sleep