______ is a good idea to row a boat in te park this weekend填什么?it ,this ,that,one?
问题描述：
______ is a good idea to row a boat in te park this weekend
填什么?it ,this ,that,one?
答
(It) is a good idea to row a boat in the park this weekend.
这个周末去公园划船是个好主意.
句型It's a good idea to do,做某事是个好主意.用it来当形式主语,真正的主语是不定式to do.