45 My father is fine , but my mother is not

46 Thoes new books are mine

47 There are twenty six boys in my class

48 Thu's bags are small - No , they aren't

49 I am in grade 6 and my sisiter is in grade 3

50 Miss White's students aren't tall , they are short

51 Lan's brother is a doctor 

52 How old is Lan ? She is 12 years old 

53 Mai and Hoa are in grade 6 . They are my friends

54 My brother is a student

55 My name is Lan . I am in grade 6

56 My school is in the countryside

57 There are 12 class room in my school 

58 What thoes is ?

59 What that is ? It's Lan

60 Her friend anh she are students

61 There is a pen in the drsk

62 She isn't fine

63 Lan and Linh are students 

64 They are in their classroom now ? 

65 My brother is an engineer

66 Where your friend is now ?

45. Is / is

46 . are

47. are

48 . are/ aren't

49 . am/ is

50 . aren't / are

51 .  is

52. sai đề, câu hỏi , nên động từ tobe đảo ra trước chủ ngữ 

⇒ How old is Hoa ?

⇒ She is 12 years old.

53. are/are

54.is

55.. is /am

56. is

57. are

58.

59 

60 , are

62, isn't

63 . are

64 .are

65 is

66 . Where is your friend now ?