国家开放大学 / 理工英语3
— Have you ever shopped online?
— _ _ _ _ _ _ .
A. Yes,I do.
B. Certainly.
C. Quite often .It is very convenient,saving me a lot of time.
— _ _ _ _ _ _ .
A. Yes,I do.
B. Certainly.
C. Quite often .It is very convenient,saving me a lot of time.
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