1. Who reads a book before he goes to bed?
1. What does Peter read before he goes to bed?
1. When does Peter read a book?
2. What device processes information with astonishing speed?
2. What do computers process with astonishing speed?
2. How fast do computers process information?
3. Where do they work twice a week?
3. How often do they work at the English language laboratory?
4. What do students know well?
4. How do students know grammar rules?
5. What often breaks down?
5. How often does the old car break down?
He told me he would follow me five minutes later.
The doctor asked Mrs Evans what temperature her daughter had had half an hour before.
Their mother cried to her children to be careful and not to turn themselves.
The greengrocer asked the woman if she liked those vegetables.
The secretary wondered how many respectable people there were there that day.
The nurse said she had been examining the patient the whole evening the previous day.
The postman asked the boy if he had offended his friends by words that week.
