Some examples are, I <em>am</em> having another piece of pizza.
She <em>is</em> making dinner for us now.
I <em>have</em> been running for over an hour.
She <em>was</em> given the grad prize.
If the options are:
<span>A. lengthy notes the author makes
B. explanatory information in a story
C. the conclusion of most tragic fiction
D. footnotes at the bottom of the page
Then the answer is B. explanatory information in a story. The main purpose of an expository text is to educate the reader, provide additional information about the topics. For example, we will always take a dictionary to look up a word, or encyclopaedia to inform ourselves in more detail.</span>