World Wide Fund for Nature was formed to do the mission of the preservation of biological diversity, sustainable use of natural resources, and the reduction of POLLUTION and wasteful consumption. a. contamination b. energy c. extinc

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 /

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

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

He is unreliable. What he says _______ be believed. a. cannot b. must not c. may not d. might not

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

15,589 species (7,266 animal species and 8,323 plant species) are now considered _______ risk _______ extinction. a. at / of b. on / in c. for / with d. in / at

_______ 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

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

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

Many nations have laws offering protection to these species, such as forbidding hunting, restricting land development or creating _______. a. agencies b. reserves c. awareness d. challenges

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

Probability of extinction depends _______ both the population size and fine details of the population demography. a. on b. in c. from d. for