In the complex sentence "Quietly, Mark placed the book exactly wher...

Which option correctly forms a question implying surprise about an unexpected past event?

The Internet is a global network of computers and other electronic devices that allows users to share information and communicate from anywhere. It ha...

During the team meeting last night, what tense would you use to describe an ongoing discussion?

Choose the sentence that correctly combines two or more expressions of time:

Select the sentence that correctly uses the past perfect tense in the passive voice.

Global warming refers to the long-term increase in Earth's average surface temperature due to human activities, principally carbon dioxide emissions r...

The theory of evolution by natural selection, first formulated in Darwin's book "On the Origin of Species" in 1859, is the process by which organisms ...

What tense would you use to describe an action that started in the past and continues up to the present moment?

Consider the sentence below:"If you ___ the chance to visit one foreign country, which country ___ it?"Choose the option that correctly fills the blan...

Which of the following sentences correctly uses comparative adjectives?