【题目】A talk on science ________ in our school last Monday.

【题目】—Can I smoke in this meeting room?

【题目】My uncle ________ Xi'an for more than two years.

【题目】Tom failed in the maths exam last week, ________ he?

【题目】The novel is funny, so I ________ it to you.

【题目】Some people waste food ________ others haven't enough.

【题目】Yesterday morning I was just leaving_______the telephone rang.

【题目】Although this maths problem is a little difficult, try to work out by ________ ,children.

【题目】The room is smart. It is ________ to a computer in the centre.

【题目】In front of our housing estate, there is ________ one-way street.