Was it in the science museum you visited yesterday you left your keys?A. that; whereB. t

问题补充：

Was it in the science museum you visited yesterday you left your keys?

A. that; where

B. that;/

C. /; that

D. where; that

答案：

A. that; where

B. that;/

(答案→)C. /; that

D. where; that

解析：考查复杂句：第一空不填，这是定语从句，先行词是the science museum，定语从句中缺少宾语，用that或which引导定语从句，或者省略关系代词，第二空填the，是强调句，强调的是in the science museum，句意：是在你昨天参观的科学博物馆你丢了钥匙吗？选C.