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. /; /
I would have helped you, but I ________ really occupied the whole week.
The education program ________ combining brain work with manual labor is being widely spread throughout the country.
The sooner we students ________ to the new school,the better it will be _______ our studies.
With everything ________, he started the slide show.
Occasions are quite rare ________ I have time to spend a day with my kids.