系统开发阶段的工作不包括（）。
A、系统分析
B、系统设计
C、系统更新
D、系统实施
参考答案：D
Sometimes walking is even _______ than driving during the busy traffic time.
A. fast B. faster C. fastest
— Did you take part in Mary's birthday party last Friday?
— I had ______ to, but one of my classmates called on me. [ ]
A. admitted
B. intended
C. agreed
D. promised
