________ global energy safety, all the countries have been called on to take joint efforts ．
#97844
A
Having ensured
B
Ensuring
C
To ensure
D
To have ensured
推荐题目
With a lot of difficult problems_____________, the newly-elected president is having a hard time.
#96201
A
settle
B
setteling
C
to settle
D
being settled
David stayed inside himself, ______ to be alone, or in a corner of the cabin.
#92077
A
to want
B
wanted
C
being wanted
D
wanting
____ from a Chinese character meaning people, the mascot “Haibao” shows the character of Chinese culture.
#95224
A
Created
B
Creating
C
To create
D
To be created