Question

he swam......... the lake (at/on)​

Answer 1

Answer:

He swam at the Lake

Explanation:

If On is going to be used in this sentence, then-->

He swam on top of the Mount Chilliad Lake

Answer 2

Answer:

at

Explanation:

he swam at the lake .

we will use at

we have a option of at / on

we will choose at