单选题In the past 200 years, Australia has lost 19 species (种类) of animals and 76 species of plants. The Australian National Parks and Wildlife Service estimates that between 100 and 250 million species of animals and plants have lived on Earth since life began about 3.5 million years ago. Today, there are between 5 and 10 million species, of which up to 1 million or more species could be extinct (灭绝) by the year 2010. Today the council of state and federal ministers responsible for nature conservation (保护) has produced a list of currently endangered vertebrate fauna (脊椎动物). Three species of whale, various birds, a number of frogs, snakes and fish are also on the list. But there is some cause for optimism (乐观). Several species previously believed extinct have reappeared in recent years. This could mean that other "extinct" species may yet surface--even the Tasmanian tiger, which some authorities believe still exists in the remote regions of Tasmania.

单选题Which country did the woman visit?

单选题There's a feeling in me ______ we'll never know what a UFO is--not ever.[A] that[B] which[C] of which[D] what

单选题Whatgamedoesthemanenjoy?

单选题Whycan'tStellaplay?

单选题He ______ here half an hour ago, but he is still on the way now.

单选题The North Pole is surrounded by land, while the South Pole is surrounded by the Antarctic Ocean. So scientists thought that______.

单选题An opposable thumb is a thumb that can.

单选题Where shall the woman get off?

单选题Mr. White______at 8:30 for the meeting, but he didn't show up.[A] should have arrived[B] should arrive[C] should have had arrived[D] should be arriving

单选题It's no use ____________ with him. He won't change his decision.

单选题Whatdoesthewomanmean?

单选题One day a layer's wife fell ill, and he went to get a doctor. The doctor willingly came to see the woman and to do what he could for her, but before he went into the house, he made a short stop. He knew that the lawyer was famous for not paying his bills, even if they were due(正当的). He therefore said to the man. "But if I save your wife, I am afraid you may not pay me." "Sir," replied the lawyer. "Here I have $ 500, whether you cure my wife or you kill her. I'll give you all this." The doctor was reassured (使消除疑虑) and went into the house. When he reached the woman's beside, it soon became clear to him that he could do little. She was seriously ill, and though he prescribed(开药方) her medicine, she soon died.He told the lawyer he was very sorry,, and then asked for the money which he had promised. "Did you kill my wife?" asked the lawyer. "Of course I didn't," said the doctor. "Well! Did you cure my wife?" asked the man. "I'm afraid that was impossible," replied the doctor. "Well, then since you neither killed my wife nor cured her, I have nothing to pay you./

单选题—How long did the meeting last this afternoon? —It was supper time ______ the meeting was over.[A] that[B] at which[C] when[D] until

单选题Britain has recently had a high level of unemployment and the same is true ______ many other countries.

单选题"A buyer will get something for nothing most probably means that ______.

单选题They have done nothing for the coming Christmas, ______.

单选题[此试题无题干]