1.You don't have to walk there.
2.I remember turning off the lights before I went out.
3.He linked his camera to his computer.
4.A dog bit his left hand.
5.If you don't receive the letter,please let us know.
6.If you really like this coat,I will buy it for you.
7.He spends a lot of time with his friends every weekend.
8.It is a pity that you did't go to the concert.
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