问题
选择题
The output of the gold mine is now four times _____ it was before liberation.
A．that
B．what
C．which
D．than
答案
答案：B
考查倍数表达方式。倍数表达方式有 A is four time as big as B="A" is four times the size of B="A" is three times bigger than B="A" is four times what B is.对照结构，选择B