问题补充：
All too it was time to go back to school after the glorious summer holidays.
A. often
B. fast
C. soon
D. late
答案：
A. often
B. fast
(答案→)C. soon
D. late
解析：all too实在太......，all too soon意为太快了，带有惋惜的意味，如：Tom had snatched a short holiday from his work to come here. He said it ended all too soon.（汤姆趁工作之暇匆匆来此渡一短假，他说，假期过得太快了。）
