Keep your child off drugs,  ________ it will ________ many serious health and behavior problems.

 — 　　　 times did you do exercise last week?   — Twice.

—Your grandparents were very great.                            —Yes. They supported my father’s schooling ______ they were very poor.

  I   didn’t   know  anything  about it ______my  father told me .

-- Our dreams won’t come true __________ we know what our dreams are.