_____never gives up will succeed.

________you never plan to visit the polar bears in the North Pole or the penguins in the South Pole，now it is the proper time to start thinking about that.

—Why didn’t you apologize to her? —She drove away ______ I could say a word. 

— I told you that he would come to see you.— Actually I had little doubt _____ it was true.

Many experts hold the view       teacher development is       the key to better education lies.