________ I went to bed, I had brushed my teeth.
Before
When
After
_______ planting trees, we need to water them regularly.
After
Before
Until
I joined an environment programme ________ I had finished high school.
while
because
as soon as
_______ I was cooking, my mother was watching TV.
when
till
while
He will wait at the cinema _____ we come.
or
because
til
______ we were planting trees, our friends were picking up rubbish.
Before
When
After
While
______ you leave your room, please turn off all the devices.
After
Before
Until
_____ Jenny left the party, she said goodbye to the host.
While
After
Before
____ the amount of carbon dioxide reduce, the environment will become better.
While
After
When
Global warming is serious ______ we are releasing a lot of carbon dioxide.
as soon as
because
until
We shouldn't use single-use products _____ they are harmful to the environement.
as soon as
after
because
I want to play badminton with my friends _____ school.
as soon as
when
after
_____ we meet him, we will call you.
Before
As soon as
Because
You can go home _____ you finish your exercises.
till
as soon as
before
It's 4 p.m. I must get to the bank _____ it closes.
until
after
before
I will visit Ha Noi City _____ I come to Vietnam.
when
while
as soon as
