He is only too ready to help others, seldom, __, refusing them when they turn to him.
269. Records, ____, walkman CD and MD are the same instruments that we can use to enjoy music.
268. The limited supply of water has been put into practice, take care to turn off the running ____ before you leave.
267. When he was very young, he made up his mind to be a doctor. Which of the following words can not be used instead of the underlined word?
266. Mr. Green's are at table now. The underlined part means ____.
265. Which of the following does not belong to the same category?