Question

6. Mark and I
running in the hall
7. Please. I
staring at you
8. She
wearing your hat. It was mine.
9. Of course I
checking my Facebook account.
laughing just now.
10. No, we
laughing just now​

Answer 1

⭐Respuesta:

6. Mark and I  are running in the hall.

7. Please. I  am staring at you

8. She is wearing your hat. It was mine.

9. Of course I  am checking my Facebook account.  

10. No, we  are laughing just now​

⭐Explicación:

Se usa are cuando: Es plural, es decir 2 o mas personas. (We, they o mas de 2 nombres)

Se usa is cuando: Es singular, es decir una sola persona. (She, He)

Se usa am: solo para hablar de nosotros (I am/ Yo soy)

Espero haberte ayudado! :)