30．Sheep on a remote Scottish island are gradually shrinking _______ global warming, according to a study published in the journal Science.

A. on account of　　 　　 B. by means of　　 　　　 C. in case of　　 　　　　　 D. in spite of

29．As is _______ known, a good knowledge of basic physics helps us better understand natural phynomenons.

　 A. universally　　　　　 B. specifically　　　　 C. adequately　　　　 D. completely

28．Over 800 pages of the earliest surviving Christian Bible have been recovered and made _______ on the Internet.

A. flexible　　 　　　　　　 B. brilliant　　 　　　　　 C. conventional　　 　　 D. available