题目
The scientists are still______inventing new methods of reaching outer space.A. working withB. working onC. working for
The scientists are still______inventing new methods of reaching outer space.
A. working with
B. working on
C. working for
题目解答
答案
B. working on
解析
此题考查的是介词短语的使用。"working with" 意为“与...一起工作”，"working on" 意为“从事，致力于”，"working for" 意为“为...工作”。根据题意，科学家们正在致力于发明新的方法来进入外太空，所以应选择 "working on"。