【单选题】Dating from around AD 1000,the largest mound surviving from the Mississippian culturewas one hundred feet high and had a base of nearly fifteen acres.
【单选题】听力原文: The year is 2501, and the Earth is desperately short of fuel. All Earth's coal, oil and wood have been used up long ago, and scientists have been sent to the ends of the universe in search of al...
【简答题】( )8. My brother usually _____ his classroom after school. But now he _____ basketball. A. cleans; plays B. is cleaning; plays C. cleans; is playing D. is cleaning; is playingA. cleans; plays B. ...
【简答题】arrogant , complement , inaugurate , transient , subjective , collaboration , rehearsal , supersonic , affix , bald 1. The school choir does not have enough time to prepare for public performances . 2...