二、单项填空 (共20小题；每小题0.5分，满分10分)
11. ______ apple four hundred years ago led to the law of gravity while _____ apple designed by Steve Jobs has changed our life greatly.
A. the; 不填 B. An; an C. An; the D. The ; an
12. ______that she was in great danger, Susan walked deeper into the thick forest.
A. Not to realize B. Not realized
C. Not to have realized D. Not realizing
13. Dogs have a very good ______ of smell and are often used to search for criminals having drugs.
A. means B. view C. sense D. idea
14. It is one of the funniest stories ______ on the Internet so far this week.
A. finding B. found C. to find D. being found
15. Later in this book cases will be discussed students’ demand have resulted in changes in the school regulation.
A．that B．which
C．when D．where
16. Not only __________ interested in football but _________ beginning to show an interest in it.
A. is the father himself, his two sons are
B. the father himself is, are his two sons
