When I got to the garage,I manage(managed) to have a quick look for the car before the salesman came out(+of) his office.Although it seemed to be in a very good condition and was worth about 1000 dollars,the garage（car） was asked 1400 dollars for it.When the salesman come(came ) out,I arranged to buy a car right away.The salesman and I got in and they(we) drove off.I like the car immediately and I dicided to testing (test) it,but,of course,I didn't speak(say) this to the salesman.Instead,I pretended not to like the car very much.
括号里是改的前面的错或者加的