单选题The reason why he didn't come to school was______ill.

单选题The mother ______ for her lost child along the woods. A. is wailing B. is moaning C. is crying D. is screaming

单选题All workers, regardless of their sex and education, are required to ______ at the age of 60. A. resign B. retire C. regain D. retain

单选题It is required by law that a husband (has to pay) the debts of his wife (until) formal notice is given (that) he no longer has to pay (her).A. has to payB. untilC. thatD. her

单选题______ was given by the committee to all of those who donated money.

单选题The accused man ______his innocence by proving that he was aboard when the murder was committed. A. found B. founded C. ignored D. established

单选题—Do you usually take a vacation? —Yes, I like to go away______.

单选题 Questions20-22 are based on the recording you have just heard.

单选题The court reversed its ______ of imprisonment, and the man went free.

单选题The Austrian manufacturing industry consists of a few large organizations, many of which operate under government auspices .

单选题It"s good to know that quite a few popular English expressions actually ______ from the Bible.

单选题The stone was so heavy that it was difficult for the old man to ______ it.

单选题It is naive to expect that any society can resolve all the social problems it is faced with ______. A. for long B. in and out C. once for all D. by nature

单选题The man was detained by the police at the airport because his passport was found to be ______.

单选题We will have to pay them a large ______ of money for their service.

单选题Several hundred million years ago, plants similar to modern ferns covered vast stretches of the land. Some were as large as trees, with giant fronds bunched at the top of trunks as straight as pillars. Others were the size of bushes and formed thickets of me undergrowth. Still others lived in the shade of giant club mosses and horsetails along the edges of swampy lagoons where giant amphibians swam. A great number of these plants were true ferns, reproducing themselves without fruits or seeds. Others had only the appearance of ferns. Their leaves had organs of sexual reproduction and produced seeds. Although their "flowers" did not have corollas these false ferns(today completely extinct)ushered in the era of flowering plants. Traces of these floras of the earliest times have been preserved in the form of fossils. Such traces are most commonly found in shale and sandstone rocks wedged between coal beds. Today only tropical forests bear living proof of tile ancient greatness of ferns. The species that grow there are no longer those of the Carboniferous period, but their variety and vast numbers, and the great size of some, remind us of the time when ferns ruled the plant kingdom.

单选题 The second thriller book was ______ by July 2015, but to the readers' sorrow, the author succumbed to the heart attack three months later.