— Where is my English book?— I brought it to you you were in hospital yesterday afternoon.

问题补充：

— Where is my English book?

— I brought it to you you were in hospital yesterday afternoon.

A. since

B. if

C. once

D. while

答案：

A. since

B. if

C. once

(答案→)D. while

解析：该题考查状语从句的用法。本句意思是；昨天下午你在住院的时候，我就把英语书带给你了。因此本题最佳答案是D。