问题补充:
I had promised to send him an email I got home but I was so busy that I forgot to do so .
A. while
B. until
C. the moment
D. ever since
答案:
A. while
B. until
(答案→)C. the moment
D. ever since
解析:这题考查连词的用法:the moment“一…就…”,句意是:我许诺一到家就给他发一份E-mail,但我太忙忘了。选C。