$\text{Bài tập 1:}$

$\text{a) Their father and mother are teachers.}$

$\text{b) His mother is a nurse.}$

$\text{c) How many students are there in your class?}$

$\text{Bài tập 2:}$

$\text{48. B.}$

$\text{69. D.}$

$\text{55. E.}$

$\text{27. A.}$

$\text{92. C.}$

$\text{99. J.}$

$\text{88. I.}$

$\text{36. F.}$

$\text{74. H.}$

$\text{98. G.}$

mother / father / teachers / their / and / are

=> Their mother and father are teachers

mother / is / his / nurse /a

=>His mother is a nurse 

dotor / father / my / a / is

=>My father is a doctor

many / class / how / are / your / there /in/ students ?

=>How many students are there in your class?

48B

69D

55E

27A

92C

99J

88I

36F

74H

98G