2 sentences

1. 把你的答案同书后面的答案对照一下，看看是否正确。

   bǎ nǐ de dá'àn tóng shū hòu​miàn de dá'àn duì​zhào yī​xià, kàn​kan shì​fǒu zhèng​què.

   Compare your answers with those at the back of the book to see if they are right.

   Source: UM-Corpus: Education

2. 他们对对照组没有做任何特别的事情。

   tā​men duì duì​zhào​zǔ méi​yǒu zuò rèn​hé tè​bié de shì​qing.

   They didn’t do anything special with the control group.

   Source: CCMatrix