A. be was patient and talkative B. he was a totally reliable witness C. he was well - informed D. he was the only person interviewed in the incident 参考答案:B 答案解析:参见文中第四段第二句。文中说爆炸发生时他在墙后,不能看作是“a hundred percent witness”,即不完全在事发现场,并不能百分之百地完全可以信赖。
第24题: [单项选择]用放射性131I治疗格雷夫斯病(Gravesdisease),两个疗程之间需要观察 () A. 1个月 B. 2个月 C. 3个月 D. 6个月 E. 12个月 参考答案:D
第25题: [单项选择]On the giant plane there are ______ the jet needs. A. twice engines than B. twice as engines as C. as twice many engines as D. twice as many engines as 参考答案:D 答案解析:[注释] 本题要注意比较级的一种句型:倍数词+as…as。这里倍数词twice必须置于 as…as之前。