Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges.

Mary invited her friend, Sarah, to have dinner out that night and Sarah accepted.

- Mary: "Shall we eat out tonight?"

- Sarah: "______”

A. That's a great idea.

B. That's acceptable.

C. See you next time.

D. You are very welcome.

Alan _____ is an official document stating that you have passed an examination,completed a course, or achieved some necessary qualifications.

A. certificate

B. requirement

C. education

D. test