II.单项填空(共15小题;每小题1分,满分15分)21.The news came to us as _______ great surprise that he had turned __________ writer. A a; a B a; / C. /; a D. /; /
9.Young adults generally make their own choices about__________job to take.
8.The silence of the library is sometimes broken by a sudden cough or the sound of pages__________.
7.John’s ability to learn from observations and experience_______greatly to his success in public life.
6.--- Is there any possible way to help them get rid of such a bad habit? --- To tell the truth, it’s very hard. But we teachers________on this problem.
5.--- Thank you every so much for your timely help. --- .