You will fail the exam unless you study hard

Will the solar panels be installed on the roof of the house tomorrow?

My daughter started studying English 2 years ago

I could stay there if I promised to keep quiet

he had overslept the previous day

the rescue workers were helping the earthquake victims then

he would teach us science subjects that semester. 

If we don't protect the environment, we will destroy ourselves

If she isn't more hard-working, she will get low marks

If he doesn't listen to his parents, he will fail

They have watched the movie for one hour

He hasn't cried for ten years. 

He hasn't gone abroad before

She has driven for one month

We have eaten since it started to rain

Nam is interested in watching TV

I have never talked to the foreigner before

He asked me if I had invited Tom to my party

She advised me to stop worrying about his exams

He agreed to come with me

My parents suggested that I should come with them 

She warned me not to believe in anythings he said

found

were laying 

was watching 

was doing 

was cooking 

took part in 

mountain-climbing

if

to find

has already gotten

this is my book

what a nice teacher

what funny cartoons

don't touch the dog

In the future, we might have robot helpers.

You can't eat seafood in PQ island. 

I use my phone by touching the screen.

You can print lots of cool things with a 3D printer.

If we plant trees in the yard, our school will become a greener space.

My future house will be surrounded by tall trees

Reusable bags are better than plastic bags because they are made from natural materials. 

If the Earth is warmer, the sea level will rise

My aunt has a small garden and she grows lots of flowers and vegetables

What time will the competition begin?

D D D B D