12. Most nations regard their airspace as extending upward as high as an aircraft can fly; no specific altitude, however, has been officially recognized as a boundary.
(A) as extending
(B) as the extent
(C) to be an extent
(D) to be an extension(A)
(E) to extend
517, sec04-12
A is best. B因为high副词要修饰动词, 且upward:upward作形容词时,必须前置,longman上定义的。upward extent奇怪表达。
补充extent(n); extend(v); extended(adj)的用法
1.extend (v) 延长
The shelf extends 20 cms from the bookcase.
2.extended(adj.)
an extended discussion: 长时间的讨论; an extended meaning : 引伸的含义
3.extent(N.):
1).to a certain extent/to some extent/to an extent (=partly) 2).They examined the extent to which (=how much) age affected language-learning ability. 3).To what extent (=how much) did she influence his decision? 4). to such an extent that/to the extent that (=so much that) Violence increased to the extent that residents were afraid to leave their homes. 5)extent of Considering the extent of his injuries he's lucky to be alive. It's too early to assess the full extent of the damage.
解释了一大堆EXTEND的用法,还是没搞清 Why E is not correct?
[此贴子已经被作者于2005-6-1 10:11:16编辑过] |