3 sentences

1. 我所能做的只有揣测。

   wǒ suǒ néng zuò de zhǐ​yǒu chuǎi​cè.

   All I can do is speculate.

   Source: CCMatrix

2. 对他的动机有很多揣测。

   duì tā de dòng​jī yǒu hěn​duō chuǎi​cè.

   There is a lot of speculation about his motivation.

   Source: CCMatrix

3. 大家都在揣测。

   dà​jiā dōu zài chuǎi​cè.

   Everyone is speculating.

   Source: CCMatrix