—Hi,John.ShallwegotoAustraliaforthelongholiday?—Sorry. ...

問題詳情：

—Hi, John. Shall we go to Australia for the long holiday?

—Sorry.  I ________ there twice.

A. have gone        B. was       C. have been     D.  has been

【回答】

C

知識點：動詞時態

題型：選擇題