`14D`

`-` Tương lai đơn + as soon as + hiện tại đơn : ngay khi làm gì

`15B`

`1B`

`2C`

`3A`

`@`$\text{Kiến thức :}$

`-` $\text{ S + last + Ved / V2 + time + ago / in + mốc thời gian / when + clause}$

`=` $\text{S + have / has + not + Ved / V3 + for / since}$

`=` $\text{It's + time + since + S + last + Ved / V2}$

`=` $\text{The last time + S + Ved / V2 + was + time + ago}$

`-` $\text{This is the first time + S + have / has + Ved / V3}$

`=` $\text{ S + have / has + never + Ved / V3 + before}$

`-` $\text{S + started / began + V-ing / to V + time + ago / in + mốc thời gian / when + clause}$

`=` $\text{S + have / has + Ved / V3 + for / since}$