19c 20b 21d 22a 23b 24d

25 arrival

26 picnicking

27 entrances

28 carelessly

29 enjoyably

30 traveling

1d 2d 3a 4c 5a 6b

Cities are more polluted than they were ten years ago

My exam results are worse than my friend's exam results

She is more attractive than when she was a child

I am happier in school than I was before

Cities are more polluted than ten years ago

I think a smartphone will not be as helpful for you as a computer

câu cuối là later that evening nhé mình gõ thiếu

I had arranged to meet my friends at the bowling alley at six

I ran through the park quickly

I got to the bowling alley at half past six

My friends were waiting patiently at the entrance

I played badly most of the evening

I kept thinking about the things I had to do at home later evening

1a 2d 3c 4b 5a 6b 7c 8d 9a 10b

1d 2c 3b 4a 5b 6d 7a 

1a 2c 3d 4c 5d 6b 7b 8a