________ 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
in charge of the shopping center has upset him for quite some time.
#98579
A
Left
B
Being left
C
Having left
D
To leave
Our school forbids_____ ,that is to say, we are not allowed ____ at school.
#96871
A
to smoke, to smoke
B
students’ smoking, smoking
C
students’ to smoke, smoking
D
students’ smoking, to smoke
After completing and signing it, please return the form to us in the envelope _______.
#91566
A
provided
B
providing
C
having provided
D
provide
Tom’s brother who is now a doctor always encourages hard and go to college.
#94511
A
for him studying
B
him studying
C
for him to study
D
him to study
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