[单项选择]Obtaining enough food is the first concern for every nation；in some countries food shortages have become a serious problem．
A. 生产足够的粮食是各国的首要国策；有些国家已面临粮食减产这一重大问题。
B. 能否获得充足的粮食关系到每个国家的生存；有些国家粮食短缺的问题日趋严重。
C. 获得足够的粮食是所有国家的头等大事；粮食短缺已成为一些国家的严重问题。
D. 首先每个国家对生产足够的粮食都会关心；有些则已经解决了粮食短缺的重大问题。

[单项选择]If a poor country managed to provide enough food for children, the yearly economic growth rate would______.
A. drop
B. not change
C. rise
D. exceed 2 percent

[单项选择]The country's first fast food chain has ______ opened about 130 stories since it entered the market in 1990.
A. so far
B. in the end
C. year by year
D. sooner or later

[单项选择]Eve, the first woman, was made ______.

[单项选择]

The first man who cooked his food, instead of eating it raw, lived so long ago that we have no idea who he was or where he lived. We do know, however, that (56) thousands of years food was always eaten cold and (57) . Perhaps the cooked food was heated accidentally by a (58) fire or by the melted lava from an erupting (59) . When people first tasted food that had been cooked, they found it tasted better. However, (60) after this discover, cooked food must have remained a rarity (61) man learned how to make and light (62) .
Primitive men who lived in hot regions could depend on the heat of the sun (63) their food. For example, in the desert (64) of the southwestern. United States, the Indians cooked their food by (65) it on a flat (66) in the hot sun. They cooked piece of meat and thin cakes of corn meal in this (67) . We surmise that the earliest kitchen (68) was stick (69) w
A. though
B. since
C. soon
D. even