She had prepared carefully for her English examination so that she could be sure of passing it on her first ________. 

As a serious candidate, you should try your best to make a good ______ on everyone you meet.

Thanks is a common _____ used in English. You can never use it too much.

Before graduation, we had got a lot of practical _____ by doing a part-time job in the factory and it was really ______ for all of us.

I didn’t know it could do terrible ______to your heart and lungs or ______was more difficult for smoking couples to become pregnant.