Complete the task

There's a mistake in each line. Cross it out and type the correct word.

Incorrect: I is not twenty. (am)

Correct: I am not twenty.

1. • I
   • are
   • twelve.

   ( [ ])

2. • She
   • am
   • a
   • doctor.

( [ ])
3. * I
* do
* happy.

( [ ])
4. * Are
* she
* a
* teacher?

( [ ])
5. * Jen
* and
* Alex
* is
* tall.

( [ ])
6. * They
* are
* no
* happy.

( [ ])
7. * Do
* Alex
* and
* Larry
* cousins?

( [ ])