The invention of steam engine greatly sped up the industrial revolution, which _____ a lot to the take-off of the world.
#68592
A
led
B
contributed
C
constructed
D
exposed
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Farmers here _________keeping the soil rich and _________diseases.
#72393
A
focus on…free of
B
center … free from
C
attend on… free of
D
depend on… free from
It is a good plan in theory, but it _____ to be seen whether it works in practice.
#68020
A
keeps
B
stays
C
stands
D
remains
Li Na had managed to ______ in motion an upsurge（高涨）of students learning tennis across Asia.
#72421
A
take
B
put
C
set
D
make
Tigers in the state often compete with villagers living close to the reserves for resources, often________ direct conflict．
#64516
A
leading to
B
relying on
C
standing for
D
consisting of