精选优质文档-倾情为你奉上2014年高考题单选21. Lessons can be learned to face the future, _ history cannot be changed.A. though B. as C. since D. unless22. The book has helped me greatly in my daily communication, especially at work _ a goodimpression is a must.A. which B. when C. as D. where23. How much do you know about the Youth Olympic Games to be held in Nanjing?Well, the media _ it in a variety of forms.A. cover B. will cover C. have covered D
