During the dialogue with Chinese youth in Shanghai, President Obama announced the U.S. would expand the number of students to study in China to 100,000 _______ ties between the two countries.
#96742
A
strengthening
B
strengthened
C
to strengthen
D
to be strengthened
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A new technique ____ out, the yields (收成) increased by 20% .
#98832
A
having working
B
having been working
C
has worked
D
had been worked
Most people prefer _____money______it .
#94497
A
spending; to earning
B
to be spending ; to be earning
C
to spend; to earn
D
having spent; to having earned