----Could you do me a favor and take these books to my office? ---- Yes._______.
27. ________ five minutes ______ before the last bus left, we arrived at the station.
26. I am moving to the countryside because the air there is much fresher than _______ in the city.
25. The farmers once used wood to build a house ______ to store grains all the year round.
24. However busy you are, try to _______ at least half an hour each day to practice listening and reading.
23. Jenny is always _______, never complaining about her poor health and other troubles.