The generator _______ due to a malfunction.

• broke down

• break down

Cells _________ and recycle their components in a process called autophagy.

The researchers were determined __________ their research despite the abhorrent weather conditions.

• to carry out

• carrying out

A nationwide survey was recently ___________ to find out specific demographic information about football fans.

Research into the space program ___________ in leaps and bounds since we first landed on the moon.

• has come on

• have come on

• is coming on

"Yes professor, my essay is ___________ really well, I have a few more chapters to write and then it should be finished".

I _____________ a great idea in my dreams yesterday, but now I can't remember it.

• come up with

• had come up with

• came up with

We need to ___________ an idea to make some extra money before summer.

Her parents _____________ her pocket money since she had the party at the house.

• cut off

• have cut off

We will need to ___________ the water supply while we try to mend the leak.