How much did the computer ________ you? And how much time do you ________ on it every day?

---Mr. Li, I can’t understand everything in class.---Don’t worry! I’ll ________ the main points at the end.

—What ______ you?  —I’m _______ of  being left alone in the house.

 –I will have the final exam(考试) next week.－I _____ you ________ good luck.

It _____________ me twenty minutes to come to school by bike.