英和和英

I can't figure out how to solve the puzzle.

I can't figure out how to solve the puzzle.

I can't figure out how to solve the puzzle.

I can't figure out how to solve the puzzle.

Let's try to solve the riddle.

It is no use trying to solve the riddle.

Don't leave the riddle.

At last I have solved the puzzle.

All of the mystery has been solved.

a fathomless mystery

I don't understand that treatment method.

to solve a puzzle―answer a puzzle

answer the riddle

Do you have any clue to the mystery?

Do you have any clue to the mystery?

He had no difficulty in explaining the mystery.

a solution of the puzzle

an answer to the puzzle

Do you have any clue to the mystery?

The mystery continues to deepen.

I want to solve many riddles.

Have you worked the puzzle out?

I don't know how to send that.

I'm at my wit's end. I can't think of any solution to this problem.

I don't know how such a rumor got about.

I don't know how to decide the matter.

My hints were lost upon him.

This is the key to the whole mystery.

I have no idea of what it is like.

I'm not clear how to deal with that problem.