[单项选择]For some people, it may be ______ to remember what they have just read ______ recall where they left their car keys.
A. much easier; than to
B. probable; as
C. better; than
D. so easy: just as

[简答题]What may a small population may mean

[填空题]Remember that some ads, such as those in the newspaper, cost money, while others may be _______________.

[简答题]In some societies people want children for what might be called familial reasons: to extend the family line or the family name, to propitiate the ancestors; to enable the proper functioning of religious rituals involving the family. Such reasons may seem thin in the modern, secularized society but they have been and are powerful indeed in other places. {{U}}In addition, one class of family reasons shares a border with the following category, namely, having children in order to maintain or improve a marriage; to hold the husband or occupy the wife; to repair or rejuvenate the marriage; to increase the number of children on the assumption that family happiness lies that way. The point is underlined by its converse: in some societies the failure to bear children (or males) is a threat to the marriage and a ready cause for divorce. Beyond all that is the profound significance of children to the very institution of the family itself. To many people, husband and wife alone do not se

[单项选择]

The idea that some groups of people may be more intelligent than others is one of those hypotheses that dare not speak its name. But Gregory Cochran is (1) to say it anyway. He is that (2) bird, a scientist who works independently (3) any institution. He helped popularize the idea that some diseases not (4) thought to have a bacterial cause were actually infections, which aroused much controversy when it was first suggested.
(5) he, however, might tremble at the (6) of what he is about to do. Together with another two scientists, he is publishing a paper which not only (7) that one group of humanity is more intelligent than the others, but explains the process that has brought this about. The group in (8) are a particular people originated from central Europe. The process is natural selection.
This group generally do well in IQ test, (9) 12-15 points above the (10) value of 100, and have contrib
A. advises
B. suggests
C. protests
D. objects