We don’t like people _ talk too much but never do anything.

_______ children in Africa have little food to eat, and we can help them.

Listen! David is talking happily with his mother in the next room.　— It ______ be his mother. She has gone to Yunnan to be a volunteer doctor.

There will not be enough space to _____ the earth in the future. [ ]

This is the first book _______ my cousin bought me.