Choose the right words to complete the instructions on writing an opinion essay.

Choose the correct option.

In an opinion essay, you [must|should|mustn't] express your personal opinion.

It's necessary to support your point of view with [vivid descriptions|reasons and examples|rhetorical questions].

The essay should be written in a(n) [formal|informal|semi-formal] style.

The tone of the essay should be [personal|impersonal|strict].