亲爱的张先生：
我外出几天之后于今天上午回到办公室，见到你们为庆祝“十·一”发出的邀请，为此我向您表示感谢。
我本能够接受邀请，但不巧我同几个外围朋友事先约好会见，他们正好那天到达，以致不能如愿以偿。
这次希望你们见谅，深信以后有机会见面、结识您和您的同事们。
李阳

A. asking a choice between "flight or fight"
B. "reaction to stress both chemically and physically"
C. "responding to crises quickly"
D. "losing heart at the signs of difficulties"

A. all of the Old English words have died out or changed their meaning
B. new words come out to meet the new situations
C. most of the changes in English vowel pronunciation are regular
D. the change in pronunciation may lead to the change in grammar