.Many scientists believe that now we can study the behavior of a three-year-old child to see ____ they will grow up to be criminals.
It is ______ he often fails in exams ______ makes his parents worried about him.
Why didn’t you go to the cinema with us yesterday evening? —I________for my uncle from Beijing at the station.
What do you want to be when you _______? —–An astronaut.
Please give the two books _____ the little boy.[ ]