Thenewdictionariesareveryuseful.They

問題詳情：

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

【回答】

A

知識點：現在完成時及其被動式

題型：選擇題