The new dictionaries are very useful. They well and already .A. sell; have been sold out

问题补充：

The new dictionaries are very useful. They well and already .

A. sell; have been sold out

B. sold; had sold out

C. sell; sell out

D. are sold; have been sold out

答案：

(答案→)A. sell; have been sold out

B. sold; had sold out

C. sell; sell out

D. are sold; have been sold out

解析：“动词＋副词（well，easily，quickly等）”中的动词不必用被动式，这类动词有read，wash，sell，open，shut，clean，bum，pull，draw等。