– You must have learnt the good news of our team winning the football match, _____ you? -- Yes. I _____ it up when having supper in the canteen. 

—Excuse me, ________ is the library from here?—It’s about 5 minutes’ walk.

Fighting an artificial greenhouse effect seems to be the greatest of environmental challenges, ________？

--- _______ is your father?--- He’s 43.

---          do you usually go to school?--- By bus.