基本信息
II. 单项选择: (共25小题, 每小题1分, 满分25分)
从A，B，C，D四个选项中，选出可以填入空白处的最佳选项。
21．I can’t remember ______ made the teacher give Mary the permission to leave the class earlier.
A．that it was what B．what it was that
C．what was it that D．that was it what
22．Tom and I seldom get together, but we ______ with each other frequently.
A．write B．correspond C．respond D．count
