Question

Frederick the Great, king of Prussia, could not sleep one night and called the guard in the antechamber brought him a book. The guard, who stayed up several nights, fell asleep on duty. ... It was a letter to his mother: "Mother, I feel very sleepy because I stood guard for the last few nights, Although it was not my turn....
From which english grammar book, is this passage taken?

Answer 1

Explanation:

Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's metabolic activities