Question

In the following passage there are blanks, each of which has been numbered. Select the correct option to fill in the blanks. The seemingly _1__ hummingbird is one of the toughest beasts in the animal kingdom. Some 330 species _2___in diverse and often brutal environments. Mysteriously, the birds are found only in North and South America. ‘They’re living 3the edge of what’s possible for vertebrates, and they’re mastering it,’ says Karl Schuchmann, a German_4_, who studied a captive hummer that lived 17 years. ‘Imagine the _5____of an organism of only five or six grams to live that long,’ he says.

A 1-delicate, 2- survive, 3- in, 4- geologist,5- persistence

B 1-robust, 2- sustain, 3- by, 4- antiquarian,5- stamina

C 1-vulnerable, 2- endure, 3- on, 4- opthalmologist,5- durability

D 1-fragile, 2- thrive, 3- at, 4- ornithologist,5- endurance

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