题目内容
从所给的四个选项中选择最佳答案
The secretary worked deep into the night, ______ a long speech for the president.
[ ]
A.to prepare B.preparing C.prepared D.was preparing
答案:B
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题目内容
从所给的四个选项中选择最佳答案
The secretary worked deep into the night, ______ a long speech for the president.
[ ]
A.to prepare B.preparing C.prepared D.was preparing