a big dream — I want to go into space, _______ will take some time to realize, I guess.

Who has rice of the three children Kitty does.

Did he go to school when he was young—- No, he taught ________ at school.

There seemed no end to theirtroubles; nowhere _________ upon a path.

It’s extremely dangerous for the drivers to _______ speed as the traffic lights are changing．