________ 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
______, I can see that those terrible events shaped me into the person I am today.
#90888
A
Having looked back
B
Looking back
C
Being looking back
D
To be looking back
Now that we’ve discussed out problem, are people happy with the decisions ?
#98966
A
taking
B
take
C
taken
D
to take
When people move to another country, they often try ________ the customs of their native land.
#98489
A
to keep on
B
to keep off
C
to keep up
D
keeping up
We're leaving at six o'clock , and hope _____ most of the journey by lunch time .
#98877
A
to do
B
to have done
C
to make
D
to have made