模仿例句改写以下句子

题目

模仿例句改写以下句子
例句：
This policeman is tall.
But that policeman is taller.
He is the tallest policeman I have even seen.
题
1.This street is clean.
2.This man is old.
3.This river is long.

答案

1.This street is clean but that street is cleanerthis is the cleanest street I have even seen.2.This man is old.but that man is older.he is the oldest man I have even seen3..This river is long.but tha...