Directions: This part is to test your ability to do practical writing. You are required to write a letter of certification according to the information given in Chinese below.
需证明的内容如下：
王小明先生在金陵高等职业技术学任英语教师4年，任职期间工作踏实，勤奋肯干，忠实可靠。
Words for reference:
高等职业技术学院: advanced vocational and technical college

A．It is no proper to wear a red dress in summer.
B．We feel happier and more active when we see light and bright colors.
C．All the machines in a factory are painted orange.
D．No machines in a factory are painted black.

A．house owners
B．mortgage advisors
C．housing companies
D．first time home buyers