问题
选择题
He was so pleased with all ______ we had done for him _____ he wrote us a letter to praise us for it.
A．what; what
B．what; that
C．that; what
D．that; that
答案
答案：D
. all 做先行词用that引导定语从句，what不可以引导定语从句。What相当于一个名词加that。第二空的that与so连接so…… that表示如此。。。。以至