4、--- At present E-mail English is more and more popular among teenagers.
--- Yes. E-mail English ______ to save time.
A. is being used B. has used C. was used D. is using
科目：初中英語 來源： 題型：
--- At present E-mail English is more and more popular among teenagers.
--- Yes. E-mail English ______ to save time.
A. is being used B. has used C. was used D. is using
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