—Whydotheylooksodisappointed?   —Theylookdisappointed

问题详情：

—Why do they look so disappointed?

    —They look disappointed ____ they can’t go to see Love Me Once More, Mom.

          A. so           B. but                 C. because           D. because of

【回答】

C

知识点：连词

题型：选择题