2 sentences

1. 他被怀疑是一名克格勃。

   tā bèi huái​yí shì yī míng Kè​gé​bó.

   He was suspected of being a KGB agent.

   Source: Dong Chinese Dictionary

2. 这部间谍小说的主角曾是一名克格勃的情报员。

   zhè bù jiàn​dié xiǎo​shuō de zhǔ​jué céng shì yī míng Kè​gé​bó de qíng​bào​yuán.

   The protagonist of this spy novel was once a KGB intelligence officer.

   Source: Dong Chinese Dictionary