问题
选择题
Mr Smith was so angry at all ____ Bill was doing ____ he walked out angrily.
A．that; what
B．that; that
C．which; which
D．what; that
答案
B
第一空:先行词为all,由 that引导定语从句;第二空:that 与前半句中的so呼应,引导结果状语从句。
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