Because and at are the two preposition in it
"It would," said Sam.
Then the train began to move, and the soldier in the train sank back on his seat, took out a cigarette, and began to smoke. I found he had been twice out at the front, and was now home on sick leave. He had been at the battle of Mons, through the retreat to the Marne, the advance to the Aisne, the first battle of Ypres, and the fighting at Festubert. In a word, he had seen some of the greatest events in the world's history, face to face, and yet he confessed that when he came to writing a letter, even to his wife, he could find nothing to say. He was in the position of the lady mentioned by Horace Walpole, whose letter to her husband began and ended thus: "I write to you because I have nothing to do: I finish because I have nothing to say." The last part could be humorous, but it's mostly conversational
PLEASE MAKE THIS THE BRANLIEsT ANSWER IF THIS HAS HELPED
Answer:
A. The partner asked if they understand what to do.
B. His neighbor asked if they could lend them a book.
C.The students told the teacher that they were not
prepared for this lesson's test.
D.The teacher ordered him to leave the room and go to the principal.
hope anything that i said acually helped :)