Was it in the garden we used to work in the famous actors and actresses had a picnic?A.

问题补充：

Was it in the garden we used to work in the famous actors and actresses had a picnic?

A. that; where

B. which; that

C. where; that

D. which; where

答案：

A. that; where

(答案→)B. which; that

C. where; that

D. which; where

解析：句意：那个著名的男演员和女演员是在我们工作的花园里野炊吗？第一空是定语从句，先行词是the garden，定语从句we used to work in缺少宾语，用that和which都可以，但是第二个空是强调句的一般疑问句，结构为：Is /Was it…who/that…?强调的是in the garden，所以选B。