Which of these sentences is written in the perfect tense? 1. I will research my topic when I get home.
2. I have researched my topic really well.
3. I researched my topic.
4. I would research my topic if I had more time.

Asap that time of year thou mayst in me behold when yellow leaves, or none, or few do hang upon those boughs which shake against the cold, bare ruined choirs, where late the sweet birds sang. in this excerpt, what is the best meaning for the word "late"? not on time until recently dead well into the evening

Ineed . (1) chimpanzees, skillful tool-users, use several objects found in their environment as tools. (2) first of all, they use sticks. (3) they have been seen inserting carefully trimmed sticks into termite mounds and then withdrawing the sticks and eating the termites that cling to them; they also are known to use sticks to steal honey from beehives. (4) in addition, chimps use leaves in a variety of ingenious ways. (5) for example, they have been seen rolling leaves into cones to use as drinking cups, dampening them and using them to clean their bodies, and chewing them until they can serve as sponges. (6) finally, chimpanzees have been observed using stones to crack open nuts. 1. in general, the major details of this paragraph are a. ways chimpanzees learn to use objects as tools. b. reasons chimpanzees use objects as tools. c. examples of objects that chimpanzees use as tools. d. ingenious ways that chimpanzees use leaves.

What does the word subordinate mean in this sentence? the office manager spoke to her subordinate in a cordial tone.