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Mata cả thanh xuân để làm

$\textit{IV. Find the mistakes in the sentences and correct them. Tick $\sqrt{}$ if there are no
mistakes.}$

$\text{1. didn't they $\rightarrow$  did they}$

$\text{2. aren't I $\rightarrow$ wasn't I }$

$\text{3. isn't it $\rightarrow$ is it }$

$\text{4. did their $\rightarrow$ did they }$

$\text{5. aren't it $\rightarrow$ isn't it }$

$\text{6. did they $\rightarrow$ didn't they}$

$\text{7. Đúng}$

$\text{8.Do you$\rightarrow$ will you }$

$\text{9.doesn't she$\rightarrow$ does she}$

$\text{10. doesn't she$\rightarrow$ doesn't he}$

$\text{11. Đúng}$

$\text{12. isn't hers$\rightarrow$ isn't she}$

$\text{13. will it $\rightarrow$will they}$

$\text{14. wasn't it $\rightarrow$isn't it}$

$\text{15. Đúng}$

$\text{16. Đúng}$

$\text{17. doesn't he $\rightarrow$wouldn't he}$

$\text{18. isn't it $\rightarrow$aren't they}$

$\text{19. have you$\rightarrow$ don't you}$

$\text{20. aren't they$\rightarrow$ isn't it}$