克拉克先生，您的咖啡已经准备好了。

___Mr. Clark, your coffee is ready.

克拉克先生正在教室里批改试卷。

___Mr. Clark is grading papers in the classroom.

学生们都很尊敬克拉克先生，因为他总是耐心解答问题。

The students all respect ___Mr. Clark because he always patiently answers their questions.