课时跟踪检测(二十三) life in the future ⅰ.单项填空 1．—was he of great help to you while you were in singapore? —________， but i appreciate his offer. a．not likely b．not exactly c．not nearly d．not willingly 2．(2012•天津六校三模)for years, scientists have been worried about the ________ of air pollution on the earth's natural conditions. a．effect b．result
