1.we are trying to repair this mechine.
2.the room is very hot.can I open the window?
3.how much does the coat cost?
4.our teacher spoke to him yesterday.
5.has your father bought a new car?yes,he has.he bought it last year.
6.the boy went to the country with his parents last week.
7.have you been to that village?yes,I have.I went there last saturday.
8.you,d better sweep the floor.
9.Did he want to do there with us?yes,he did.
10.can you send this letter for me?
11.don,t go out now.It is raining.
12.how long has your grandmother lived in this city?for twenty years.
13.when did you finish this work?the day before yesterday.
14.Have you been to London before?yes,I spent my holiday there last year.
15.How long have you studied English?I have studied English for three years.
16.where have you been I have been to the dentist.Has he taken out your bad tooth?yes,he has.
