I don’t know _____ next.

 You are too tired, please stop _______.

—Do you like communicating with your friends on QQ or MSN?—____. I’d rather ____ the mobile phone.

—Could you tell me how to improve spoken English?—Well, just take every chance to practice ________ and don’t be shy.

Mike was late for class, so the teacher made him         at the back of the         classroom.