A : Oh, it's cold tonight. But the sky is very clear. It's a good night ⓐ______ watch the stars.

B : There are so many stars in the sky.

A : Hmm..... Listen! Can you hear?

B : What?

A : Listen to the sound of the stars.

B : ⓑAre you kidding me?

A :No, sometimes stars seem to make beautiful      sounds.

B : Do you think so?

A : ⓒYes.