-- Drugs have done great harm to some people and their families.--Quite true, so we should ________ them.
Albert Einstein was _______a great scientist.
We were all _______with the _______trip to Dalian.
Every year lots of trees ______to make our country more beautiful.
I’m ______hungry. Could I have something to eat?
-When will your brother return? –I will tell you as soon as he ___back.