Probability of extinction depends _______ both the population size and fine details of the population demography.
a. on b. in c. from d. for
A
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20
I _______ find my own way there. You _______ wait for me.
a. should / can't b. have to / must c. can / needn't d. might / mustn't
C
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10
She ___ be ill. I have just seen her playing basketball in the school yard.
a. needn't b. shouldn't c. mustn't d. can't
D
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15
When you have a small child in the house, you _______ leave small objects lying around. Such objects _______ be swallowed, causing serious injury or even death.
a. should / must b. should not / might c. needn't / may d. mustn't / ca
B
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trap
No points!
Oops!
shark
Other team loses 10 points!
Okay!
rocket
Go to first place!
Okay!
lifesaver
Give 20 points!
Oops!
15
He is unreliable. What he says _______ be believed.
a. cannot b. must not c. may not d. might not
A
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20
A / an _______ species is a population of an organism which is at risk of becoming extinct.
a. dangerous b. endanger c. endangered d. endangerment
C
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15
You _______ take your umbrella along with you today. It _______ rain later on this afternoon.
a. ought to / mustn't b. needn't / will c. will / must d. should / might
D
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20
Internationally, 189 countries have signed _______ accord agreeing to create Biodiversity Action Plans to protect endangered and other threatened species.
a. a b. an c. the d. Ã
B
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15
Many modern medicines are derived _______ plants and animals.
a. on b. for c. from d. in
C
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15
Being listed as an endangered species can have negative EFFECT since it could make a species more desirable for collectors and poachers.
a. awareness b. preservation c. support d. impact
D
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10
_______ is the existence of a wide variety of plant and animal species living in their natural environment. .
a. Biodiversity b. Conservation c. Globe d. Individual
A
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15
It is found that endangered species are often concentrated in areas that are poor and densely populated, such as much of Asia and Africa.
a. disappeared b. increased c. threatened d. reduced
C
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20
Peter has been working for 10 hours. He _______ be very tired now.
a. needn't b. must c. has to d. should