4 sentences

1. 饭做好了，大家快来开饭吧。

   fàn zuò hǎo le, dà​jiā kuài lái kāi​fàn ba.

   Dinner is ready; come and eat, everyone.

   Source: Dong Chinese Dictionary

2. 妈妈说我们不能在开饭前吃饼干。

   mā​ma shuō wǒ​men bù néng zài kāi​fàn qián chī bǐng​gān.

   Mommy said we can't have cookies before dinner.

   Source: OpenSubtitles

3. 开饭了，主人热情地请各位客人入席。

   kāi​fàn le, zhǔ​rén rè​qíng de qǐng gè​wèi kè​rén rù xí.

   Dinner is ready; the host warmly invites the guests to take their seats.

   Source: Dong Chinese Dictionary

4. 开饭铃一响，大家就抢着去食堂排队领饭。

   kāi​fàn líng yī xiǎng, dà​jiā jiù qiǎng zhe qù shí​táng pái​duì lǐng fàn.

   As soon as the dinner bell rang, everyone rushed to the cafeteria to line up for food.

   Source: Dong Chinese Dictionary