Current extinction rates are at least 100 to 1,000 times higher than _______ rates found in the fossil record.

The girl seems to be more ________

Almost half of turtles and tortoises are known to be threatened with ____.

Many teenagers show signs of anxiety and _______ when being asked about their future.

Many Vietnamese people ______ their lives for the revolutionary cause of the nation

He cycled and had an accident.

Not many places at the universities are left,so choice is on a severe _______.

Constant _______ of attack makes everyday life dangerous here.

English is the most used language in the world.

._______ speaking,I do not really like my present job.

Don't read that book.It's _____.

This book is not really ________.It is a waste of money buying it.

She sent me a _______ letter thanking me for my invitation.

A book may be evaluated by a reader or professional writer to create a book ________.

How many means of________do you use on a regular basis?

No one can predict the future exactly.Things may happen _______.