.Was it in 2000he was still in middle schoolthis boy became an expert at computer?A. when

问题补充：

.Was it in 2000he was still in middle schoolthis boy became an

expert at computer?

A. when; that

B. that; where

C. when; where

D. that; that

答案：

(答案→)A. when; that

B. that; where

C. when; where

D. that; that

解析：“是在2000年他还在上中学时这个男孩就成了电脑专家了吗？”第一空是定语从句，第二空是强调句型，答案A。