In text 9A2BBB, the word who (l.19) refers to 
According to text 9A2CCC, concept mapping 
In text 9A2CCC, the word their (l.15) refers to 
According to text 9A2DDD, 
In text 9A3AAA, the word clearest (l.1) expresses the 
The word from is used in the first sentence of text 9A3AAA to specify 
In text 9A3BBB, the word should (l.5), is used to express 
Concerning the ideas of text 9A4AAA, choose the correct option. 
According to text 9A4AAA, 
Based on text 9A4AAA, it can be concluded that 