21.Effective weight management requires a longterm ________ in order to lose weight for good.
A. establishment B. commitment C. tournament D. assessment
【答案】B
【解析】
【详解】考查名词辨析。A. establishment建立，成立；B. commitment投入，承诺，保证；献身；C. tournament锦标赛；D. assessment评估；句意：为了减肥，有效的体重管理需要长期的投入。根据句意可知B项正确。
22.China will ________ cooperation with countries and regions participating in the Belt and Road Initiative.
A. approve B. justify C. enhance D. tighten
【答案】C
【解析】
【详解】考查动词辨析。A. approve批准；B. justify为…辩护；证明…恰当；C. enhance提高，增加，加强；D. tighten勒紧，固定；enhance cooperation意为增强交流合作。句意：这个会加强和参与一带一路倡议的国家和的确的合作。根据句意可知C项正确。
