____ the standard of living for 3 billion people will create massive opportunities, XiJinping said at the fifth BRICS summit , and he called for major cooperation projects. 
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A
Improve
B
Improved
C
Improves
D
Improving
推荐题目
I had never expected _____ such a big audience there.
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A
it to be
B
there being
C
there to be
D
there to have
You can’t imagine what difficulty I had ________ you home.
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A
find
B
to find
C
finding
D
found
_______ in the leg made it impossible for him to walk to school every day.
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A
Being injured
B
Injured
C
Having injured
D
Injuring