问题
选择题
We may find that learning a foreign language does not have to be________learning our mother tongue，but can in fact be twice ________.
A．twice as hard as；as easy as
B．as twice hard as；as easy
C．twice as hard as；as easy
D．as twice hard；as easy as
答案
答案：C
答案 C [考查倍数表达法。倍数twice应放在比较等级前，排除第二空格后无其他词，故as easy as中第二个as应去掉。]
