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

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(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。