20.The prospect of increased prices has already ______ worries.

　　A) provoked

　　B) irritated

　　C) inspired

　　D) hoisted

　　21.The suspect ______ that he had not been in the neighbourhood at the time of the crime.

　　A) advocated

　　B) alleged

　　C) addressed

　　D) announced

　　22.Although the colonists ______ to some extent with the native Americans , the Indians' influence on American culture and language was not extensive.

　　A) migrated

　　B) matched

　　C) mingled

　　D) melted

　　23.E-mail is a convenient, highly democratic informal medium for conveying messages that _______ well to human needs.

　　A) adheres

　　B) reflects

　　C) conforms

　　D) satisfies

　　24.The wings of the bird still ______ after it had been shot down.

　　A) slapped

　　B) scratched

　　C) flapped

　　D) fluctuated

　　25.The disagreement over trade restrictions could seriously ?______ relations between the two countries.

　　A) tumble

　　B) jeopardize

　　C) manipulate

　　D) intimidate

　　26.When you put up wallpaper, should you ______ the edges or put them next to each other?

　　A) coincide

　　B) extend

　　C) overlap

　　D) collide