I stayed up late doing my homework yesterday so I had trouble up early this morning.A. g

问题补充：

I stayed up late doing my homework yesterday, so I had trouble up early this morning.

A. get

B. getting

C. got

D. to get

答案：

A. get

(答案→)B. getting

C. got

D. to get

解析：固定句式have some trouble/difficult in doing sth做某事有困难，其中的介词in可以省略。句义：昨天我熬夜很晚做家庭作业，所以我今天早晨很难起床。故B正确。