9 Penicillin was discovered by chance in 1928.

　　A finally

　　B accidentally

　　C experimentally

　　D opportunely

　　10 Bladder wrack， a tough， leathery brown seaweed， clings to rocks tenaciously.

　　A grows under

　　B hides under

　　C sticks to

　　D yields to

　　11 Sue was distraught waiting for her mother to come to last night.

　　A make a social debut

　　B regain consciousness

　　C come home in spite of difficulty

　　D meet her immediately

　　12 Psychologists have done extensive studies of how well patients comply with doctors orders.

　　A obey

　　B understand

　　C improve with

　　D agree with

　　13 The Taconic Mountains form part of the dividing line between New York and Massachusetts.

　　A geographic dispute

　　B boundary

　　C scenic attractions

　　D territory

　　14 My wife wants me to do away with my shoes.

　　A dispense with

　　B get rid of

　　C do without

　　D maul

　　15 The Pop Art of the 1960s used imagery drawn from the everyday world.

　　A understood by

　　B approved by

　　C censored in

　　D taken from

　　答案：1 C 2 C 3 B 4 A 5 C 6 B 7 A 8 C 9 B 10 C 11 B 12 A 13 B 14 B 15 D