His decades of effort began to__________ , for his new breed of rice h-考呗网题库移动版

单选题His decades of effort began to__________ , for his new breed of rice had become more popular.
A. pay off
B. call off
C. pull off
D. lay off

参考答案A

解析:pay off赢利，有回报；call off取消；pull off努力实现，赢得；lay off解聘。题干意思：他十几年的努力终于有所回报，他培育的新品种水稻已经很受欢迎。

单选题The one-year course is only to__________ the foundations of good technical training.
A. lead to
B. let down
C. come to
D. lay down

单选题The author assumes that his readers are__________ the basic concepts.
A. careful with
B. careful to
C. familiar with
D. familiar to

单选题The man whose cart got__________ in the mud preyed to God for help instead of getting it out himself.
A. engaged
B. stuck
C. marked
D. plunged