1．This has been a timely reminder of the need for ________ care.
A．tentative B．constant
C．permanent D．primary
答案与解析：B constant“持续的，不断的”。句意：这件事适时地提醒我们要注意时时谨慎。tentative“不确定的，踌躇的”；permanent“永久的”；primary “主要的，初期的，基本的”。
2．The secretary was allowed ten more minutes.She ________ her boss' patience and tried to hurry.
A．sensed B．tolerated
C．realized D．understood
答案与解析：A 考查动词辨析。老板多给的十分钟使秘书感到了(sense)老板的耐心。如果忽略了后面的“and tried to hurry”就很容易误选C项。
