An IGCSE paper will ask students to comment on the opening lines. Look at some opening sentences here:
“A cradle won’t hold my baby.”
—Daniel Woodrell, “Uncle”
The opening sentences say a lot here.
Is the "cradle" too small?
Is the "baby" too big?
Is it that the "baby" is very naughty or cranky or boisterous?
These opening lines say little and leave much unsaid for the reader. Thev have set a path for the story to unfold.