阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项．
I can still remember it like it was yesterday．I was a college freshman and had 21 up most of the night before laughing and talking with friends．Now just before first 22 of the day my eyelids were feeling heavier and heavier and my head was drifting down to my desk to make my textbook a 23 .A few minutes nap（嗑睡）time before class couldn’t 24 I thought．
BOOM! I lifted my head suddenly and my eyes opened wider than saucers．I looked around with my 25 beating wildly trying to find the cause of the 26 ．My young professor was looking back at mc with a boyish（孩子气的）smile on his face．He had 27 dropped the textbooks he was carrying onto his desk．“Good
