将以下单句改为宾语从句的复句

题目

将以下单句改为宾语从句的复句
1 Where does she live?Do you know?
2 What can a computer do?The scientist told us.
3 How can I get to the station?Could you tell me?
4 Whose watch is this?Does anybody know?
5 When is our English teacher's birthday?I don't know.
6 Which one did you like best?She asked me.
7 When will the holiday begin?I asked the teather.
8 When will the train arrive?He asked me.
9 Will a foreigner give a speech on computer next week?Can you tell me?
10 Were you at home before nice last night?The policeman wants to know.
11 Will it rain tomorrow?Nobody knows.
12 Has he come back from Guangzhou?I don't know.

答案

do you know where she lives?
th scientist told us what a computer could do.
以此类推
我看了一下别人的答案,基本上在第二个上全都错了.
因为前面是told,是过去式,因此从句里的can要变成could,也是过去式.