2 sentences

1. 他们忙着做纸花。

   tā​men máng​zhe zuò zhǐ​huā.

   They are busy making paper flowers.

   Source: AI Challenger 2017

2. 我在忙着做纸花。

   wǒ zài máng​zhe zuò zhǐ​huā.

   I am busy making paper flowers.

   Source: AI Challenger 2017