Life is like a mirror．______you smile at it，it will smile back．
A.Unless B.When C.Until D.Though
一“Food Safety”problem is becoming______these days．
﹣I think so．The government must do something to deal with it．
A.smaller and smaller B.worse and worse
C.better and better D.nicer and nicer
﹣What do you think of the environment here？
﹣Wonderful!______of the land ______covered with trees and grass．
A.Two fifths； is B.Two fifth； is
C.Two fifths； are D.Two fifth； are
The“teacher﹣free exam”means that students take their exams______teachers．Students must be more honest．
A．without B．against C．through D.with
﹣Don't be angry with your kid when he makes a mistake again，will you？
﹣No，I won't．I know that ______of us are perfect after all．
A.none B.neither C.each D.all
﹣Do you know about the scientist Tu Youyou？
﹣Yes，she won the 2015 Nobel Prize in medicine because of her great______．
A.surprise B.achievement
C.education D.satisfaction
