精选优质文档-倾情为你奉上.单项选择(15分)( )21.He _ when the UFO arrived. A. was sleeping B. were sleeping C. has slept D. is asleep( )22.I have been skating _ nine oclock. A. for B. since C. at D. from( )23.Would you mind _ those old jeans?A. dont wear B. not to wear C. arent wearing D. not wearing( )24.-Hes never been to an aquarium. -_. A. Neither have I B. Neither do I C. I nev
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