问题
选择题
— 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
答案
答案：C
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— 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
答案：C