GR47.HKII-10- Word form

Scientists have overcome the challenges of the________ by using modern devices.

• deepen

• depth

• deep

• deeply

People have been challenged by the________that lie beneath the ocean.

• mysteries

• mysterious

• mysteriously

• mystery

They send submarines to ________the seabed.

• investigation

• investigate

• investigative

• investigates

Vegetation can help __________ water.

• conservation

• conservationist

• conserve

• conservative

In the zoo of the new kind, animals may suffer from________ diseases.

• dangerous

• endanger

• dangerously

• danger

A forest fire_____________ valuable wood, wildlife and good soil.

• destroys

• destructive

• destructively

• destruction

If two people____________ with each other, they can understand each other.

• communicative

• communication

• communicator

• communicate

Nam's success at school____________ his parents.

• delights

• delightful

• delightfully

• delight

Who __________America?

• discovery

• discoverer

• discoverable

• discovered

She didn't ________________ in the discussion.

• participation

• participate

• participant

• participatory