Which theme do these lines support?

Read this excerpt from tim o’brien‘s “ambush” “i had already pulled the pin on a grenade. i had come to a crouch” which literary device is most clearly shown in this excerpt?

Has anyone taken the voices of modernism (1920s to 1940s) unit test? ? i really need read the following sentence. the cars passing by are filled with commuters. identify the present participle in the sentence. a. by b. are c. passing d. filled

May someone me with these questions