4 sentences

1. 柏林墙是怎样倒塌的？

   bǎi​lín​qiáng shì zěn​yàng dǎo​tā de?

   How Did the Berlin Wall Fall?

   Source: CCMatrix

2. 柏林墙是什么时候建的？

   bǎi​lín​qiáng shì shén​me​shí​hou jiàn de?

   When was the Berlin Wall built?

   Source: CCMatrix

3. 20年前，柏林墙倒塌了。

   20 nián​qián, bǎi​lín​qiáng dǎo​tā le.

   Twenty years ago the Berlin Wall fell.

   Source: CCMatrix

4. 柏林墙的倒塌为德国统一铺平了道路。

   bǎi​lín​qiáng de dǎo​tā wèi dé​guó tǒng​yī pū píng le dào​lù.

   The fall of the Berlin Wall paved the way for German reunification.

   Source: CCMatrix