2. 外语
  3. At that time I had no idea______I could hand it to him without being seen.

At that time I had no idea______I could hand it to him without being seen.

admin2010-02-22  69
问题 At that time I had no idea______I could hand it to him without being seen.
选项 A、if
B、how
C、which
D、that how
答案B
解析
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