A lot of money _________ looking after the poor children who are unable to go to school．

A lot of money _________ looking after the poor children who are unable to go to school．

A.is spent

B.has paid

C.is taken

D.has cost

答案及解析： A

解析：

考查spend time/money(in)doing sth．的被动形式，主语是单数。