26.D　 might as well此处表“将就”做某事。

25.B　 could have done对过去时间里发生的事情的推测“可能……过”。

24.C　 this year alone“仅仅今年(就)……”。

23.C　 表过去动作。

22.B　 “闻起来”，现在分词表主动意义。Smelling短语作原因状语。

21.D　 the public公众，cure表“治疗方法”时，可数。

35. Having ended the major combat (主战), President Bush_____ rebuilding Iraq.

A. started out B. went all out　 C. turned to　 D. went on

34._____ private cars are bringing us convenience, they may also cause more traffic accidents and pollution.

A. While　　 B. As　　 　C. If　　　 D. Since

33._____ I toured Zhang Jiajie, I was deeply impressed with its beautiful scenery.

A. For the first time　　　　 B. At first　

C. It was the first time　　　 D. The first time

32. After months of voyage, Columbus arrived in_____ later proved a new continent.

A. where　 B. what　 C. which　　 D. that