--Do you know the man standing there?

--Yes, he is one of ________ friends.

We have worked for three hours. Now let's stop ________ a rest.

Can you find the answers ________ the questions?

[　　]

Is this pen yours?

No, it's not ________. It's Elsa's.

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Yours bones ________ the same DNA as your skin.

I knew the answers ________ those questions.

Your body uses this pattern to build ________.

Except ________ identical twins, each living thing has its own unique DNA.

Your DNA comes ________ your parents.

He said ________ at the meeting and just. sat there silently.