11. 8a

New economy policy did not produce the desired _______

• affect

• effect

Scientists are investigating how changes in climate_________ the ozone layer.

• effect

• affect

I’ll _______ why I don’t believe your story.

• effect

• produce

• explain

• affect

It is __________ for children to be afraid of the dark.

• explanation

• communication

• production

• common

Plants ________ oxygen

• evolve

• produce

• appear

• invent

He will star in the Los Angeles _________ of "Phantom of the Opera' this year.

• production

• producer

• produce

• productive

James Dyson is the _________ of the bagless vacuum cleaner

• invention

• inventor

• explorer

• comminicator

• discovery

Our guide __________us through the mountains.

• leaded

• leader

• led

• lead to

Parents sometimes find it difficult to ________ with their teenage children.

• communicator

• communicative

• communicated

• communicate

If I'm not _______within the next two years, I'm going to change jobs.

• promotion

• promoted

• promoter

• promotional