The following sentence uses which principal part of the verb?

out the window, they saw two deer in a field.

present participle

past

present

past participle

Why is one side of the moon called the dark side of the moon?

Aman lives on the twelfth floor of an apartment building. every morning he takes the elevator down to the lobby and leaves the building. in the evening, he gets into the elevator, and, if there is someone else in the elevator -- or if it was raining that day -- he goes back to his floor directly. otherwise, he goes to the tenth floor and walks up two flights of stairs to his apartment.

Which would best develop a well-organized and logical research paper? a. narrow goals b. a variety of sources c. good research results d. a strong topic