The book was received so eagerly that it on the first day.A. sold upB. was sold upC. was

问题补充：

The book was received so eagerly that it on the first day.

A. sold up

B. was sold up

C. was sold out

D. sold out

答案：

A. sold up

B. was sold up

(答案→)C. was sold out

D. sold out

解析：sell up卖完，强调为还债而卖，而sell out只是卖完。