--It is cold outside. You’d better wear warm clothes to ________ the cold.  --Ok, thanks.

 --- Whose shirt is this? --- It _______ be Li Lei’s. It is too big for him. 

---What he enjoys _____ great and interesting. ---Yes,____ it's dangerous. 　 

—What would you do if you had your fingers ______?  —If I _______ you. I should ask the first-aid. 

—Why do you collect so many old bikes?—I'Il have them       _ and give away to the children who don't have bikes.