题目

He ______to swim across the Channel, but they failed because of the terrible weather. A. succeeded     B. managed    C. attempted    D. thought 答案：C 解析: attempt指试图做某事，不一定做成。句意为: 他试图游过海峡, 但由于天气失败了。manage指经过困难而“设法对付”含有达到目的之意。 succeed和 think的结构分别为： succeed in doing sth , think sb to be…，后面够不能接不定式。1．12吨的$\frac{2}{3}$是10吨，15克是45克的$\frac{1}{3}$．