Question

【题目】China is making great efforts _________ people’s living standards（水平）.

A. improve B. improving C. improved D. to improve

Answer 1

【答案】D

【解析】

句意：中国正在努力提高人民的生活水平。A. improve动词原形；B. improving分词或动名词；C. improved过去式；D. to improve动词不定式。文中提到"making great efforts"做最大努力，固定搭配为make efforts to do sth尽力做某事，故答案选D。