3 sentences

1. 他的双亲都已年过七旬。

   tā de shuāng​qīn dōu yǐ nián guò qī​xún.

   Both of his parents are over seventy years old.

   Source: Dong Chinese Dictionary

2. 他在战争中失去了双亲，成了一名孤儿。

   tā zài zhàn​zhēng zhōng shī​qù le shuāng​qīn, chéng le yī míng gū'ér.

   He lost both his parents in the war and became an orphan.

   Source: Dong Chinese Dictionary

3. 他在战争中失去了双亲，成了一个孤儿。

   tā zài zhàn​zhēng zhōng shī​qù le shuāng​qīn, chéng le yī gè gū'ér.

   He lost both parents in the war and became an orphan.

   Source: Dong Chinese Dictionary