I my homework at home this morning.A. forgotB. have forgottenC. leaveD. left

问题补充：

I my homework at home this morning.

A. forgot

B. have forgotten

C. leave

D. left

答案：

A. forgot

B. have forgotten

C. leave

(答案→)D. left

解析：D this morning“今天上午”是过去的时间，故用一般过去时。forget是“忘记”，而leave是“遗忘，遗留”。故选D。