EL12 U10

A / an _______ species is a population of an organism which is at risk of becoming extinct.

• dangerous

• endanger

• endangered

• endangerment

Only a few of the many species at risk of extinction actually make it to the lists and obtain legal _______.

• protect

• protection

• protective

• protector

I _______ find my own way there. You _______ wait for me.

• should / can't

• have to / must

• can / needn't

• might / mustn't

You _______ take your umbrella along with you today. It _______ rain later this afternoon. 

• ought to / mustn't

• needn't / will

• will / must

• should / might

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

• extinct

• extinction

• extinctive

• extinctly

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

• nature

• natural

• naturally

• naturalness

Toxic chemicals from factories are one of the serious factors that lead wildlife to the _______ of extinction.

• wall

• fence

• verge

• bridge

You _______ forget to pay the rent tomorrow. The landlord is very strict about paying on time.

• needn't

• mustn't

• do not have to

• may not

 I am not deaf. You _______ shout.

• must

• mustn't

• need

• needn’t

 I do not mind at all. You _______ apologize.

• shouldn't

• needn't

• mustn't

• oughtn't to