Can you please check these sentences, Writeacher?

Question

1) We...... (sit) in the sun for ... when she (tell) us to get inside.
2)We had been sitting in the sun for about half an hour when she told us to get inside.
3) Peter confessed to eating all the cake. (Peter/confess) (shall I include "to" as part of the verb?)
4) We booked a table before going to the restaurant. This is the most interesting museum I have ever visited.
5) How long ago did they leave?
How long is it since they left?
6) I haven't eaten anything since this morning. (since 8 am).
When I arrived at home, my parents had already left.
7) He is likely to be at work. It is probable that he is at work. He is probably at work. = He should/ought to be at work

Answer 1

1) We...... (sit) in the sun for ... when she (tell) us to get inside.
2)We had been sitting in the sun for about half an hour when she told us to get inside.
http://www.jiskha.com/display.cgi?id=1341239942

3) Peter confessed to eating all the cake. (Peter/confess) (shall I include "to" as part of the verb?) yes

4) OK

5) OK

6) OK

7) He is likely to be at work. It is probable that he is at work. He is probably at work. = He could/ought to be at work.