单项选择题
I seem（）him somewhere before, but I can't remember where．
A.to have seenB.to be seeingC.seeingD.having seen
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.
单项选择题 The（）of blood always makes me feel sick.
