4 sentences

1. 它曾经是一座办公楼。

   tā céng​jīng shì yī​zuò bàn​gōng​lóu.

   It used to be an office building.

   Source: CCMatrix

2. 这只是一栋办公楼。

   zhè zhī shì yī dòng bàn​gōng​lóu.

   This is just an office building.

   Source: CCMatrix

3. 我可能会在高高的办公楼里上班。

   wǒ kě​néng huì zài gāo​gāo de bàn​gōng​lóu li shàng bān.

   I might work in a tall office building.

   Source: AI Challenger 2017

4. 在荷兰，自行车停放场地无所不在——学校、办公楼和商店外面。

   zài hé​lán, zì​xíng​chē tíng​fàng chǎng​dì wú​suǒ​bù​zài— xué​xiào, bàn​gōng​lóu hé shāng​diàn wài​miàn.

   Bike parking facilities are ubiquitous in The Netherlands — outside schools, office buildings and shops.

   Source: CCMatrix