`1.` o'clock → bỏ

⇒ o'clock chỉ dùng cho giờ đúng như: 7 o'clock (7 giờ đúng), 13 o'clock (13 giờ đúng)

`2`. finish → finishes

⇒ My school là CN số ít

`3`. (What) do → (What) does

`4. `water → watered

⇒ yesterday → QKĐ

`5.` on → to

`6`. on → in

`7`. field → hospital

`8.` factory worker → Famer

`9`. pupil → teacher

$\text{13 .}$

$\text{1 . o'clock -> bỏ/thay bằng a.m}$

$\text{2 . finish -> finishes}$

$\text{3 . do(trước your sister) -> does}$

$\text{4 . water -> watered}$

$\text{5 . on -> to}$

$\text{6 . on -> in}$

$\text{7 . in -> on}$

$\text{8 . plants -> grows}$

$\text{9 . pupil -> teacher}$

@Minh