问题
选择题
Almost seven tons of amber__________ the Amber Room.
A．was used to make
B．was used to making
C．were used to make
D．were used to making
答案
答案：C
考查主谓一致。seven tons of amber七吨的琥珀，谓语动词用复数，be used to do sth.被用来做某事，故选C。