What is it?
It's an endangered animal.
What kind of pollution do factories cause?
They cause water pollution.
Complete the sentence: There _________ (be) boats.
used to be
Say the word...
traffic jam
Complete the sentence: The lake _________ (be) a glacier.
used to be
Complete the sentence:
There _________ (not be) tall buldings.
didn't use to be
Complete the sentence: When he arrived, the meeting ____________ (start).
had started
Say the word...
renewable energy
What have they done?
They have recycled plastic bottles.
Complete the sentence: The baby had been delivered before the father _________ (get) to the hospital.
arrived
Complete the sentence: By the time, he got to the station, the train ____________ (leave).
had left
What is it?
It's rubbish.
What is it?
It's litter.
What is she doing?
She is cleaning up the beach.
What are they doing?
They are voting (for president).
Complete the sentence: He _________ (arrive) at the church after they had gotten married.
arrived
What kind of pollution do plants cause?
They cause air pollution.