根据所给汉语，完成下列英语句子，每空一词。

1. 他如此粗心,以致常常犯错误.

   He is so careless that he often ___  ___.

2. 许多外国人发现学好汉语真不容易.

Many foreigners find___ difficult ___learn Chinese well.

3. 文波长大后想当一名医生.

When Wen Bo___ ___ , he wants to be a doctor.

4. 我哥哥至少和你一样高.

  My brother is at least ___tall ___you.

5. 我盼望着与你相见. 

   I'm looking forward ___ ___you.

最常见的城镇基本形式是( )。

A．带型形态

B．散点型形态

C．集中型形态

D．放射型形态