ouple ,the Smiths can alwaysmake the _____ decision to work through their problems

Stephen Hawking believes that earth is unlikely to be the only planet ______ life has developed gradually[ ]

After a successful operation, my brother is beginning to ___ and will soon come back to school.

Are you free after school– Sorry. I’ve planned to treat a friend of mine todinner ___ for his help.

Barack Hussein Obama, the present president of the USA, ________ a naughty (调皮的) boy at school.