The option to finish the sentence is option A, Would.
If he were a bird, he Would fly. He is thinking of what he would do if he were a bird, which he is not. The words will, shall and should do not work, because he is not a bird, and therefor he can't fly. He would fly, but he can't.
A digit in the ten thousands place compares to a digit in the thousands place because it is it has an extra zero and a digit in the ten thousands place is one place value ahead of the digit in the thousands place
I think the answer is that Sarah should look up words she doesn't know for chapter titles, headings and first paragraphs and write the main idea in her own words.
