Was it in 2002 he was still at middle school the boy became expert at computer?A. that;

问题补充：

Was it in 2002 he was still at middle school the boy became expert at computer?

A. that; where

B. when; where

C. that; when

D. when; that

答案：

A. that; where

B. when; where

C. that; when

(答案→)D. when; that

解析：考察强调句型和定语从句。本题强调的是时间状语in 2002 when he was still at middle school.其中定语从句When he was still at middle school修饰先行词2002;第二空that与it was构成强调句型的基本结构。故D正确。