[2010·陕西西工大附中4次训练]People have lots of problems living in the central Australian desert, the lack of water is the most serious one. A. of which B. which C. for which D. where 17A考查定语从句的关系词.此处考查介词前置.其相当于the lack of water is the most serious one of the problems. 【查看更多】
