I can’t find my English book. I must it at home this morning.A. forgetB. leaveC. have for

问题补充：

I can’t find my English book. I must it at home this morning.

A. forget

B. leave

C. have forgotten

D. have left

答案：

A. forget

B. leave

C. have forgotten

(答案→)D. have left

解析：must后加完成时表示叙述过去的事情, 把….留在家里不能用forget,只能用 leave