问题补充：
29. To greatly raise people’s living conditions, .
A. all kinds of measures have taken
B. they have taken all kinds of measures
C. it is said that they have taken all kinds of measures
D. I think they have taken all kinds of measures
答案：
A. all kinds of measures have taken
(答案→)B. they have taken all kinds of measures
C. it is said that they have taken all kinds of measures
D. I think they have taken all kinds of measures
解析：本题考查非谓语动词。分析语境可知，为了提高人民生活水平的逻辑主语应为“他们”，因此应用they做主句主语。句意：为了提高人民生活水平，他们已经采取了各种措施。
