问题
选择题
In fact, the house as well as his two cars ______ him all the money he earned during the 20 years．
A．has been cost
B．have cost
C．has cost
D．have been cost
答案
答案：C
考查主谓一致。as well as连接两个部分做主语时，谓语动词要根据前一部分来判断，因此用单数；而sth cost sb money，因此不用被动。选C。