Past Tense Contrast, Indefinite Pronouns

Rainforests _________ a third of the Earth, but now they are getting smaller.

While we _________ the Maths test, the fire alarm went off.

Alexander Fleming _________ penicillin by accident while he _________ at some old experiments.

While Newton _________ under an apple tree, an apple _________ on his head, and he _________ gravity.

The rainforest was full of sounds. Birds _________ from the trees and thousands of insects _________.

I _________ my bag on the train this morning.

When I _________ to use my laptop, I realized the battery _________ down.

She _________ jeans, but now prefers dresses.

While I _________ my hometask, my younger sister _________ cartoons.

He _________ school and _________ the University.

I _________ like basketball, but now I love it.

He _________ football last weekend.

_________ in London people speak English.

There isn't _________ interesting at the exhibition.

I understood _________.

I haven't seen her _________.

_________ took my backpack.

There are shops and cafes _________ in this street.

I knew _________ at the meeting. They were all my sister's classmates.

What are you cooking? _________ smells nice.