11．My brother is an actor．He   is several films so far．   

They use computers to keep the traffic _______ smoothly. 

I can’t thank you too much for your kindness because without your help I        have won the first prize in the speech contest．

—Are you sure Mike will help us if we are in trouble? — _____. He is a reliable friend.

If you had seen a doctor, you       much better now.