【题目】I heard that John was very hard to get along with, so I wonder _____ Sam got on so well with him.

【题目】Two _____students gathered at the school gate to have a meeting.

【题目】Since we started in last September we have raised fifty thousand pounds for these homeless children, _____ is pretty good.

【题目】This is _____useful book for most of you.

【题目】I don’t think home shopping will take the place of in-store shopping completely, _____ shopping online is very popular among customers.

【题目】Worrying about your weight is more likely to lead to you _____ yourself with a piece of chocolate or cake.

【题目】I went out to take part in a party with my friends and didn’t come home until midnight last night. That’s _____ my mother got so angry with me.

【题目】I know the boy, _____father is an engineer.

【题目】While _____the money, he found a false note.

【题目】When Stan was five years old, his father died in a traffic accident, leaving his mother to _____ three children alone.