In Chinese， date 5﹣20has a similar pronunciation to"I love you"，making it ______lucky and romantic day．（　　）

A．a； theB．/； aC．the； aD．a；/

Do you know about the scientist Tu Youyou？

Yes，she won the 2015 Nobel Prize in medicine because of her great ．（　　）

A．surpriseB．achievement

C．educationD．satisfaction

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．noneB．neitherC．eachD．all

The"teacher﹣free exam"means that students take their exams teachers．Students must be more honest．（　　）

A．withoutB．againstC．throughD．by

What do you think of the environment here？

Wonderful! of the land covered with trees and grass．（　　）

A．Two fifths； isB．Two fifth； is

C．Two fifths； areD．Two fifth； are