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
网友回答
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。