1.an 2.a 3.a 4.an 5.a 6.an 7.a 8.a 9.an 10.an1.How far 2.a 3.an 4.What 5.A 6.a 7.how long 8.but1.I have a penfriend and he is from the UK.2.Tomorrow is OK,but I won't be free until lunchtime.3.Bob is a nice boy,so his classmates like him very much 4.Smoking is a bad habit,and it can be dangerous to your health.5.My leg still hurts,so I will go to see a doctor.
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