问题补充：
单选题Themanagersaidthattheyhadan_____planiftheplantheyhadsubmittedwasnotaccepted.A.alternateB.alternativeC.absoluteD.appreciable
答案：
B解析alternative 可提供选择的，两者挑一的：alternate交替的：1)There was no alternative route open to her. (在她面前没有另外可供选择的路线。)2)French and English are not alternative courses; but may be taken in the same year.(语法和英语并不是交替开设的课程；而可以在同一年里选修。)
