13. 1 (work) here for three years. 14. You (not/do)
your project yet, I suppose.
15. I just (see) Andrew and he says he ... already (do). about half of the pla
16. L. just (decide).
... to start working next week.
17. He (be)..
at his computer for seven hours.
18. My father (not/play) any sport since last year.
19. Alice (see)
the accident when she was catching the bus.
20. What you (do)
when I called?
21. 1 (not visit). my friends last summer holiday,
22. While people (talk) to each other, he read ) his book.
23. you (find)
your keys yesterday?
24. Who she (dance),
with at the party last night?
25. They (watch )...
football on TV at 7 p. m yesterday.
26. When Hoa arrived at the theater, the film
(start).

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).

it the character ahdfg gsytriw   errtywer erwqtydfgb gwty

there is no paragraph seven here.

impartial means: treating all rivals or disputants equally; fair and just.

i would say that impartial is agreeing with something, because impartial means to treat your rivals, arguments, and reasoning equally and fair. so if you rival says something, agreeing on it means you did the impartial.