问题
选择题
----I didn’t realize how popular the restaurant was until I made a reservation the other day.
----I beg your pardon, but when ?
A．was you realized it
B．it was that you realized it
C．you realized it
D．was it that you realized it
答案
答案：D
题目分析:考查疑问句。根据问号可知此句需用一般疑问句语序，排除B、C选项；而A选项语法错误，D选项是强调句型，故正确答案是D。句意：---直到前几天预订桌位我才意识到这家饭店是多么受欢迎。---请再说一遍，你什么时候意识到的这一点？