Units 11~12 Scientific achievements Fact and fantasy Ⅰ
单项填空1.The President is now on a visit to Russia, ________ at expanding relations between the two countries
A.aims B.to aiming C.being aimed D.aimed解析:be aimed at doing sth
是习语,此处因为是作伴随状语,故用过去分词形式
答案:D2 . This experiment turned out to be ________ failure, but, as we know, success often comes after ________failure
A.a;a B./;/ C.a;/ D./;a解析:failure 指“失败的人或事”时,是可数名词;泛指失败时是不可数名词
答案:C3.To my delight, I found the new flat ________ in pleasant surroundings
A.located B.locating C.to locate D.being located解析:be located in“坐落在”是固定用法,此处用过去分词作宾语补足语
答案:A4.These doctors are busy day and night, ________ a cure for AIDS
A.bringing on B.pulling on C.taking on D.working on解析:work on“从事于”,此处意为“在研究一种治疗艾滋病的方法”
答案:D5.Now there is just one point ________ I w