It was not long before she could see with difficulty a group of chimpanzees It was ... a group of chimpanzees?

In my opinion, the internet caused a complete change in the way people live. In my opinion ... a complete change in the way people live.

It was a difficult problem, can you solve it? It was ... .

In wars and battles, soldiers always try to destroy completely the important places of the enemy. In wars and battles ... the important places of the enemy.

Whales and elephants can communicate by receiving sounds from each other. Whales ... sounds from each other.

I found it hard to understand what the physics teacher was talking about. I found ... what the physics teacher was talking about.

You must explain your idea very clearly so he understands. You must ... your idea so he understands.

Rana has drawn my attention to a problem. Rana ... a problem to me.

I couldn’t process so much information. I ... all the information.

'It was a difficult problem, can you solve it'?

'Whales and elephants can communicate by receiving sounds from each other'?

'I found it hard to understand what the physics teacher was talking about'?

'You must explain your idea very clearly so he understands'?