ing to a recent survey, homework is ______ students most often blame for their lack of sleep．

Loud music and other noises can annoy neighbors, _________ at night.

－You must say sorry to Mary, Jack.－Why ________ I say sorry to her? It’s her who hurt me first.

Seeing that e﹣commerce is an industry that ________ large amounts of money, she is considering breaking into the field.

He is no longer a child，and let him learn to________the problem himself.[ ]