— Boys and girls please hand in your homework after class.— Oh my god ! I it at home.A.

问题补充：

— Boys and girls, please hand in your homework after class.

— Oh, my god ! I it at home.

A. forgot

B. left

C. forget

D. leave

答案：

A. forgot

(答案→)B. left

C. forget

D. leave

解析：forget 忘记；leave离开。句意：同学们，课后请把你们的作业交上来。——哦，我的天！我把它丢在家里面了。结合语境可知下文表示的过去发生动作，故用一般过去时态。Forget后面一般接非谓语动词作宾语，且不接地点状语，故选B。