问题
选择题
The USA plans arms sale to Taiwan, which forces China to ____ its modernization process in national defence. [ ]
A. set up
B. build up
C. take up
D. step up
答案
答案：D
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The USA plans arms sale to Taiwan, which forces China to ____ its modernization process in national defence. [ ]
A. set up
B. build up
C. take up
D. step up
答案：D