单项选择题
A.adapt B.withdraw C.withstand D.shade
Since many insects have already become（）to DDT, scienti...
单项选择题Since many insects have already become（）to DDT, scientists have to look for some new insecticide
A.activeB.resistantC.toughD.gradual
His parents no longer worry about him. He has a good jo...
单项选择题His parents no longer worry about him. He has a good job and can live（）his own now.
A.at B.by C.on D.with
He（）the medicine quickly and then drank some orange jui...
单项选择题He（）the medicine quickly and then drank some orange juice.
A.sucked B.swallowed C.licked D.digested
