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
Shanghai is the first city in the world ____a high-speed maglev train, from the city to Pudong Airport.
#98099
A
to build
B
to be built
C
to have built
D
to have been built
___________ a fine day, Shenzhou VI will be launched on time according to its planned time.
#98923
A
Being
B
It being
C
To be
D
It is
Every minute must be made full use _______ in class.
#90893
A
of studying
B
to study
C
to studying
D
of to study
_______ with the size of the whole earth, the highest mountain does not seem high at all.
#94302
A
Compare
B
Comparing
C
When compared
D
When comparing
Elizabeth Taylor, the Hollywood legend died at CedarsSinai Hospital ________ by her four children after being taken to hospital six weeks ago with heart failure.
#95995
A
to be surrounded
B
having been surrounded
C
surrounded
D
surrounding