—DavidhasgonetoAustraliaonbusiness.—Really?I

問題詳情：

—David has gone to Australia on business.

—Really? I ______ why he was absent from today’s meeting.

A. am wondering             B. wonder             C. was wondering      D. had wondered

【回答】

C

知識點：過去進行時及其被動式

題型：選擇題