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Jack Sampson, the vice president of Urban Automotives, is famous for being very ------- to his clients

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If there were no subjunctive mood, English______much easier

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We might have failed if you______us a helping hand

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They’ve been going ________ for so long now that all their friends expect them to marry soon

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_________ is the machine used to wash the dishes

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Some organisms seem to be potentially immortal. Unless an accident puts an end to life, they appear to be fully capable of surviving indefinitely

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Parents are always willing to lend a sympathetic ____ to their children when they have problems

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With his speed, I think he'll ______________ a record for running before he graduates from high school.

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_______ he is more than 65 years old now, he is still quite active

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How long does it_______ him to walk to his school?

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I ________  him of the meeting to the other day. I wonder why he didn’t turn up

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By 1820, there were over sixty steamboats on the Mississippi river, _____ were quite luxurious

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The most amazing thing about this year’s Oscar winning film is that it was made on a shoestring budget

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Hollywood, the heart of America's motion picture industry, ............. of Los Angeles a century ago

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They were trained in the most prestigious hospital, _______ ?

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Management is looking _________ ways of cutting costs

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_______ a study on the origin of the virus, WHO scientists decided to publish their findings on a website

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The sports meet, originally due to be held last Friday, was finally ____ because of the bad weather

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She easily adapts to new environment. Clearly, she quickly settled ___________ in her new house

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Going by train isn’t __________ convenient as going by car

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Polar bears are in danger of dying out. (25) _____ some other endangered animals, it's not hunters that are the problem, it's climate change. Since 1979, the ice cap at the Arctic Circle where the polar bears live has reduced in size by about 30 per cent. The temperature in the Arctic has slowly been rising and this is (26) _____ the sea ice to melt, endangering the polar bears' home. The polar bears' main sources of food are the different types of seals found in the Arctic. They catch them by waiting next to the air holes seals have made in the ice. (27) _____ the bears are very strong swimmers, they could never catch seals in water. This means that the bears really do rely on the ice to hunt. Polar bears also need sea ice to travel. They can cover a huge territory and often swim from one part of the ice to another. They have been (28) _____ to swim up to 100 km, but when there is less ice, they may have to swim further and this can (29) _____ fatal to the bears. A number of bears have drown in the last few years and scientists believe that it is because they were not able to reach more ice before they became too tired and couldn't swim any further