问题
选择题
I think _____ of the materials I listen to at the beginning of the exam _____easy.
A．two thirds, is
B．second three, are
C．two thirds, are
D．two third, are
答案
答案：C
基数词十序数词的适当形式.作主语时，根据后接的名词的单复数，本题后接的可数名词复数形式，故选C