答案:经济建设。
A. until a certain point
B. to some point
C. to some extent
D. until a certain extent
解析:解析:to some extent(在某种程度上)
A. the way they sound
B. the way they to sound
C. the way they're sounding
D. as they are sounding
A. is caught
B. are caught
C. catch
D. is catching
解析:解析:quantities 复数形式
A. 础润而雨
B. 冬去春来
C. 摩擦生热
D. 电闪雷鸣
A. difficulty to understand
B. difficulty in understanding
C. difficulties at understanding
D. difficulties to understand
解析:解析:have any difficulty in doing sth.
A. f(1)-f(0)
B. 2[f(1)-f(0)]
C. 2[f(2)-f(0)]
D.
解析:解析:
A. will see
B. be seen
C. have seen
D. have been seeing
A. paid off
B. showed off
C. rang off
D. kept off
A. excited
B. exciting
C. excitement
D. excitingly
A. After
B. Although
C. As
D. Before
解析:解析:er (在什么之后);although (尽管);as (因为);before (在……之前)解析:because和so不能同时用 as和so不能连用