单项选择题
The secretary worked late into the night，（）a long speech for the president.
A.to prepareB.preparingC.preparedD.was preparing
单项选择题 I seem（）him somewhere before, but I can't remember where．
单项选择题 When my wife asked me to pay the bill after the meal，I found I（）no money on me．
单项选择题 Mrs.Smith was much disappointed to find the washing machine she had had（）went wrong again.
