Составит из этих слов предложение 1. known/sandra/long/you/how/have? 2. long/london/for/time/lived/helen/a/has/in? 3. camping/times/you/many/been/have/how?

1. How long have you known Sandra?
2. Has Helen lived in London for a long time?
3. How many times have you been camping?

1. How long have you known Sandra?

 2. Has Helen lived in London for a long time?

 3. How many times have you been camping?