If you say my name, I will no longer exist. What am I?

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

O_er_t_o_

Complete the missing letters of the given word.

John was piloting a plane behind a car but was never able to overtake it. Why?

Can you find the missing piece of the Porsche?

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

I know a nine-letter word having only one vowel.
Do you ?