He was arrested by the police on suspicion of secret photography.

Tousei, have you finished your homework for today yet?

She let out a deep sigh.

The sea was raging like surging waves.

He was diagnosed with schizophrenia.

Prepositions are an important part of grammar.

I placed the materials before the important meeting.

In this experiment, it is necessary to let the sample stand overnight.

This yogurt is left to stand for 24 hours to ferment.

We must consider appropriate measures for this problem.