SAT真题上的一题greatly affected the acosystems of some southeast swamplands.A.To trap and remove large alligatorsB.The trapping and removal of large alligators

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SAT真题上的一题greatly affected the acosystems of some southeast swamplands.A.To trap and remove large alligatorsB.The trapping and removal of large alligators

SAT真题上的一题greatly affected the acosystems of some southeast swamplands.A.To trap and remove large alligatorsB.The trapping and removal of large alligators
SAT真题上的一题
greatly affected the acosystems of some southeast swamplands.
A.To trap and remove large alligators
B.The trapping and removal of large alligators

SAT真题上的一题greatly affected the acosystems of some southeast swamplands.A.To trap and remove large alligatorsB.The trapping and removal of large alligators
应该选择b答案.
to do 应该表达将要的意思,而此句里affected是过去式,在sat里将来时与过去时是不能出现在一个句子里的.

B,名词和动名词做主语。