$\color{#88DCFF}{\text{#Byen.}}$

`1` Thu said that she felt stressed out because she was going to take an exam the next week

I `->` she

feel `->` felt

am `->` was

next week `->` the next week / the following day

`2` Phong said to me that his parents was very proud of his good marks

my `->` his

are `->` was

`3` The teacher said all the homework had to be done carefully

must `->` had to

`4` David said to me that I needed to take a break then

You `->` I

need `->` needed

now `->` then

`5` Hoa said that she might visit her parents that summer

I `->` she

may `->` might

my `->` her

this `->` that

`6` She said that she was working on disadvantages of living in big cities then

I `->` she

am `->` was

now `->` then

`7` He said that he had rescued the children from the fire in that ancient temple

I `->` he

have `->` had

this `->` that

`8` Lan said that they had gone to Japan despite the earthquake

we `->` they

went `->` had gone

`9` David said that he hadn't gone to the cinemathe the day before

I `->` he

didn't go `->` hadn't gone

yesterday `->` the day before/ the previous day

`10` She told Mike that she had just left the party

I `->` she

have `->` had

`11` Mai said that she didn't agree to do a research on natural disaster

I `->` she

don't `->` didn't

`12` She said that they wouldn't be able to improve the environmental issue

won't `->` wouldn't

`13` Tuan said that she didn't want to attend the festival

doesn't `->` didn't

`14` The president said that they had to save endangered animals and would have to protect the Earth

we `->` they

must `->` had to

will `->` would

`15` Kien said to his friends he had used to study the geography of Asia there 

I `->` he

used `->` had used

here `->` there

`-` CT :

S + told ( sb ) / said ( to sb ) + ( that ) + S + V-lùi thì