L4课前测

They held a party (a)   (celebrate) their success.

It is no use (a)   (regret) your past mistake.

She was elected a (a)   (product) worker.

He regretted (a)   (complete) his task in time.

Getting enough exercise is of great (a)   (necessary)

We need to have a close (a)   (relate) with each other.

A few minutes later the bomb went (a)   , destroying the vehicle

It is essential (a)   (wash) hands before having a meal.

A young man was found (a)   (beat) to death last night.

A national park is a  (a)   (protect) area where you can see animals and plants in their natural habitat.