【题目】Too high house prices can be brought under control, ________ the authorities introduce a series of regulatory policies.
A． even if B． as if

C． so that D． provided that

【答案】D

【解析】even if即使； as if好像； so that以便；provided that倘若。根据句意，可知选D。句意：倘若相关当局能后出台一些调控的政策，过高的房价能够被控制住的。