.下列那些措施不属于生物防治

A．投放赤蜂眼灭棉铃虫

B．青蛙防治水稻害虫

C．用性引诱剂诱捕某些害虫

D．喷洒DDT等农药杀灭蚊.蝇

This is the student（）I know will pass the TOEFL test.

A.who

B.whom

C.whose  

D.what