Conservationists have long debated whether the koala should go on the Australian national threatened species list. __________ the koala is clearly in trouble in some parts of the country – in Queensland, for example, high numbers are afflicted by disease – in other parts such as Victoria and South Australia the problem is not that koala populations __________, but that they have grown to the point where they are almost too numerous.
For a species to be classed as vulnerable, its population ___________ by more than 30 percent over the last three generations or 10 years. The problem is that when such a stipulation is applied to koalas, the Victorian boom offsets the Queensland bust, and the species stays off the list.
This has repercussions because northern koalas are different to southern ones. They are smaller, for example, and they contain a genetic variation not represented in the South. __________, a split listing has been devised koalas from New South Wales, the ACT and Queensland are now officially ‘Vulnerable’; those from Victoria and South Australia are not considered threatened.
(A) Because However Despite While
(B) had been falling were falling are falling had fallen
(C) must have decreased will be decreasing was decreased has decreased
(D) According to this For this reason For instance In contrast
1. D (While): indicates contrast
2. C (are falling): Present Continuous for current situation (indicated by hove grown)
3. A (must have decreased): a stipulation or condition for the ‘vulnerable’ classification
4. B (For this reason): preceded by a reason and followed by a consequence