Everyone has his own dreams, but not all the dreams can always _________.

Liao Dong is __ __ his eraser, and _____ it finally. 

This ________ my grandfather and those are my ________.

—Jack, could you help me        when the plane will take off on the Internet? —I’m sorry, my computer doesn’t work.

My father is used to _______ in the country. He doesn’t want to move to the city.