At the same time B. On the other hand C. For example D. In another word
A. in B. at C. to D. of
A. l0 a.m. B. 5 p.m. C. 11 p.m. D. 8 a.m.
Ask the operator to call you back later. B. Make a "person-to-person" call. Call back outside office hours. D. Wait and call again when the line is free.
A. 正确 B. 错误
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