摘要:16.What is the speaker doing? A. Giving a talk to welcome some visitors. B. Making an introduction to the visit. C. Saying goodbye to the visitors.

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A. A teacher.
B. A student.
C. A bookseller.
7. When will they use the computers?
[     ]
A. On Tuesdays.
B. On Wednesdays.
C. On Thursdays.
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