Be careful when you deal with this chemical, as it will explode when ______ to sunlight.
#88860
A
exposed
B
to expose
C
exposing
D
being exposed
推荐题目
People couldn’t help ______ the foolish girl.
#97555
A
laugh at
B
to laugh at
C
laughing at
D
laughing :
The bad weather meant__________ the rocket launch(发射)for 48 hours,．
#97940
A
delaying
B
having delayed
C
to delay
D
to have delayed
There are some students ______ to have known what they don’t really know, which is really harmful to them.
#94235
A
pretending
B
to pretend
C
pretended
D
pretend
In the past month, cruel snowstorms hit some European countries and America , great transportation problems in these countries.
#95684
A
causing
B
caused
C
to cause
D
having caused
_________ the exercises, we went on to learn the new words in the next unit.
#88696
A
Finished
B
To finish
C
Having finished
D
Finishing