Studying in groups is necessary _________________ you want to do well in school.
Red-crowned cranes fly to Yancheng Nature reserve _______ spend the winter.
That company _____________ us ¥30, 000 in 2013 to help the children in need.
The boy ran away _____________ I could say a word.
We found it ______ on well with him.
This piano is too big. Can you make_______ for it?