. He made up his mind to devote his life____________the river____________polluted.
#97630
A
to prevent, to be
B
to prevent, from being
C
to preventing, to be
D
to preventing, from being
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Rare species in the world, ______ by hundreds every year, must be jointly preserved by all countries, or humans will encounter ecological disaster in the near future.
#94233
A
disappeared
B
disappearing
C
disappear
D
having disappeared
______ on ten years of observation and study, the theory shows that every one dreams every night, whether they realized it or not.
#90335
A
Basing
B
Based
C
Being based
D
Having based
Our waste recycling project ________ a lot of investigation and paperwork had been done by the end of last term.
#88785
A
involved
B
to involve
C
being involved
D
involving
His first book ___________ next months is based on a true story.
#93027
A
published
B
to be published
C
to published
D
being published