183. --- You look pale, what troubled you?

--- I ______ my dead friend.

A．am thinking about

B．was thinking about

C．had thought about

D．will think about

给予无乳糖和半乳糖饮食可控制和治疗哪种类型的白内障（）

A.并发性白内障

B.手足搐搦性白内障

C.糖尿病性白内障

D.中毒性白内障

E.半乳糖性白内障