—He was nearly drowned in a pool.
—Oh, when was exactly?
— It was in 1983 he was swimming with his friends.
A. this; that
B. that; when
C. that; that
D. it; where
网友回答
A. this; that
(答案→)B. that; when
C. that; that
D. it; where
解析：考查定语从句和强调句型。本题第一空使用that指代上文说过的事情。第二空的when he was…是对先行词1983介词解释说明的，因为后面的句子很完整，故使用关系副词when来引导定语从句，后面还省略了that he was nearly drowned in a pool。句意：——他差点在游泳池里淹死。——那是在什么时候啊？—就是在1983年他和朋友一起游泳的时候，发生了这样的事情的。故B正确。