New2grammar“
Hi YL, do you mind explaining what you think of each of the choices?
Thanks!
”
Two lost mountain hikers were rescued when a private plane saw flashing lights [on top/on the top/at the top] of the mountain,
on the top of 'the mountain -- There are two the's and so on top is more appropriate.
at the top of 'the mountain -- Something is not at the top of another thing. The clock is at the top of the cupboard. (not correct)
The clock is on top of the cupboard. (correct)