A lot of fish in the river _______ recently, because there is lots of pollution.

We wouldn’t have called a taxi yesterday if Harold __________us a ride home.[ ]

I’m a little tired. Let’s go to the zoo by taxi.—We take a taxi. It’s not far from here.

They are teachers and don’t realize the basic/primary rules and principles _____ to start and run a company

The rescuing soldiers in the helicopters ________ to land on that earthquakestricken area, but failed again and again.[ ]