mary an American friend ___ looking forwatd to visiting china at present.A.are B.is C.were D.have been 为什么?

分类: 作业答案 • 2022-04-20 15:37:18

问题描述：

mary an American friend ___ looking forwatd to visiting china at present.
A.are B.is C.were D.have been 为什么?

答