A. to
B. with
C. on
D. for
A. of
B. for
C. to
D. on
A. to
B. of
C. in
D. with
A. endanger
B. endangered
C. dangerous
D. danger
A. prevent
B. distinguish
C. preserve
D. survive
A. offspring
B. ecology
C. landscape
D. benefit
A. destroy
B. grow
C. develop
D. support
A. improvement
B. reassessment
C. maintenance
D. distinction
A. powerful
B. significant
C. disastrous
D. detectable
A. discharging
B. dumping
C. producing
D. exposing
A. on
B. up
C. in
D. round
A. made up
B. set up
C. brought up
D. taken up
A. cut down
B. cut off
C. cut in
D. cut out
A. extinction
B. disappearance
C. abolition
D. establishment
A. human
B. humane
C. humanized
D. humanistic
A. Fertilizers
B. Pesticides
C. Herbicides
D. Medicines
A. encourage
B. decrease
C. discourage
D. prohibit
A. die out
B. die down
C. die away
D. die from
A. cooperation
B. coordination
C. corporation
D. coexistence
A. nearly extinct
B. near extinction
C. extinct near
D. extinction nearly
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