13, A – more and more serious than (Adj-er and Adj-er: ngày càng…)

14, C – the more comfortable the service is (the more…, the more…: càng… càng…)

15, D – hotter and hotter.

16, D – Mai can’t cook as well as Thanh does

17, D – is becoming more and more difficult.

18, B – Peter runs faster than John does.

26, B – the hotter/ the more

27, b – the more and the merrier

28, d – more and more difficult

30, A – far more difficult than

31, C – The more/ the more violent

32, C – the cleverer

33, C – The richer/ the happier

34, A – the sooner we can leave

35, d – more and more panicked

36, B – the tighter

37, A – the

38, C – worse/ worse

53, A – more/ more

54, a – worse

55, c  - the more interesting

56, C – the higher your bill will be.

57, a – the harder/ the better

58, d – the later/ the louder

59, b – better and better

P/s: Lần sau bạn chụp ảnh rõ hơn nhé

60, c – colder and colder