27、Atlanta      a series of fierce fights between blacks and whites in the 1960s.

   A. had              B. gathered            C. saw           D. overcame

26、 Just like fingerprints, each person's DNA is      unless he has a twin.

   A. unusual               B. likely                    C. various            D. unique

25、― Where is the plane? I can’t see it.

― It went off its _____ to keep away from the sudden storm.

A. road             B. course           C. flight          D. direction

24、 It’s ____ kind of you to take so much trouble with me.

A. awfully          B. foolishly          C. differently        D. patiently

23、______well prepared you are, you still need a lot of luck in mountain climbing.

A. However                 B. Whatever                 C. No matter                D. Although

22、So much of interest ______ that most visitors simply run out of time before seeing it all.

A. offers Beijing           B. Beijing offers     C. does Beijing offer     D. Beijing does offer

21、We went through a period ______ communications were very difficult in the rural areas.

A. witch                     B. whose                            C. in which                  D. with which

19、In recent years many football clubs ______ as business to make a profit.

A. have run                  B. have been run           C had been run             D. will run

18、It has been proved ______ eating vegetables in childhood helps to protect you against serious illnesses in later life.

A. if                            B. because                   C. when                             D. that