He lost 2000 dollars yesterday,which ___ a big sum for an ordinary clerk.
问题描述：
He lost 2000 dollars yesterday,which ___ a big sum for an ordinary clerk.
a、were
b、are
c、 was
d、 had been
答
选c、 was
钱的复数形式“2000 dollars ”理解成一个整体,做单数看待,又因为时间是过去时间“ yesterday”,因此be动词用过去式的单数形式was