61. By turning this knob to the right you can ________ the sound from the radio.

　　A) intensify C) enlarge

　　B) amplify D) reinforce

　　62. One of the attractive features of the course was the way the practical work had been ________ with the theoretical aspects of the subject.

　　A) embedded C) integrated

　　B) embraced D) synthesized

　　63. They couldn't see a ________ of hope that they would be saved by a passing ship.

　　A) grain C) slice

　　B) span D) gleam

　　64. The traditional markets retain their ________ for the many Chinese who still prefer fresh food like live fish, ducks, chickens over packaged or frozen goods.

　　A) appeal C) image

　　B) pledge D) survival

　　65. ________ efforts are needed in order to finish important but unpleasant tasks.

　　A) Consecutive C) Perpetual

　　B) Condensed D) Persistent