第18题:[单选题] In our factory there are 2000 workers, two thirds of _____ are women. A. them B. which C. whom D. who 参考答案:C 非限定性定语从句中介词后接which/whom,先行词指物用which,先行词指人用whom,而原句中指人,因此选择whom。A、B、D与原句不符合,因此排除。故选C。
A. Keep on B. Keep out C. Keep up D. Keep up with 参考答案:C 答案解析:[解析] keep on意为“继续”;keep out意为“把…关在外面,使不进入”;keep up意为“不低落,维持,继续”,keep up with意为“跟上,不落后”。本句意为:失败是成功之母,