Only a few of the many species at risk of extinction actually make it to the lists and obtain legal _______. a. protect b. protection c. protective d. protector

A / an _______ species is a population of an organism which is at risk of becoming extinct. a. dangerous b. endanger c. endangered d. endangerment

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

Hiking the trail to the peak _______ be dangerous if you are not well prepared for dramatic weather changes. You _______ research the route a little more before you attempt the ascent. a. might / can b. may / mustn't c. can /

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

_______ is a branch of Natural Science, and is the study of living organisms and how they interact with their environment. a. Biology b. Biological c. Biologist d. Biologically

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

Peter has been working for 10 hours. He _______ be very tired now. a. needn't b. must c. has to d. should

Frank's wallet is lying on the coffee table. He _______ it here last night. a. must have left b. should have left c. must be leaving d. needn't leave

Jenny's engagement ring was precious! It _______ have cost a fortune. a. must b. should c. can d. needn't

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

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. Ø