12.--I ____ becoming an astronaut (宇航员) when I was at school. -- Really? Do you still think it will ____ ?
Many people believe if you are _______, better things will happen to you.
I’ve just read your blood test report and all seems OK, so there’s _______ to worry about.
--Could you help me with some math problems? --Sure. That’s _______ I’m here.
What _________ pity you didn’t go to ______ concert with us! It was so exciting!
—You cough so badly recently. Give up smoking, please! —__________. I think I am addicted to it.