`19.` C are

`20.` B will have been married

 `-` S + will have + P2
`21.` B get
`22.` A will call

`23.` B will be fishing

`24.` B. are tripping

`25.`  will have been teaching

Công thức Tương lai đơn:

(+)  S + will + Vo + O.

(-) S + will + not + Vo + O.

(?) Will + S + Vo + O ?

DHNB : in the future , tomorrow , tonight, in + tgian ,next day/month/year,....

`19.`

$\text{Form:}$

`+)` am/is/are + going to + V(inf) + adv/O

`->` $\textit{Ta chọn C}$

`20.`

DHNB: for 25 years, tomorrow `->` TLHT

$\text{Form:}$

`+)` will have been + V(PII) + adv/O

`->` $\textit{Ta chọn B}$

`21.`

$\text{Form:}$

`+)` S + will + V(inf) + adv/O + when + S + V(-s/es) + adv/O

`->` $\textit{Ta chọn B}$

`22.`

$\text{Form:}$

`+)` expect + S + will do sth

`->` $\textit{Ta chọn A}$

`23.`

DHNB: this time tomorrow `->` TLTD

$\text{Form:}$

`+)` will be + V-ing + adv/O

`->` $\textit{Ta chọn B}$

`24.`

DHNB: Be careful! `->` HTTD

$\text{Form:}$

`+)` am/is/are + V-ing + adv/O

`->` $\textit{Ta chọn B}$

`25.`

DHNB: By June `->` TLHTTD

$\text{Form:}$

`+)` will have been + V-ing + adv/O

`->` $\textit{Ta chọn C}$