题干
________ is not easy ________ the river. Because the river is too deep(深的).
A：That; cross
B：This, to cross
C：It; to cross
D：It's, to cross
答案(点此获取答案解析）
C
________ is not easy ________ the river. Because the river is too deep(深的).
A：That; cross
B：This, to cross
C：It; to cross
D：It's, to cross
