Here are some concepts: book, smile, stack

What is a sentence about these concepts?

Sentence is below.
a stack of books makes me smile .

Here are some concepts: brain, scientist, think

What is a sentence about these concepts?

Sentence is below.
scientists have discovered that the brain is times more active than previously thought .

Here are some concepts: boat, coast, harbour, sunrise

What is a sentence about these concepts?

Sentence is below.
sunrise over boats in the harbour on the coast

Here are some concepts: athlete, game, look, receiver, state

What is a sentence about these concepts?
Sentence is below.
athlete looks for a receiver during a game against us state .