Choose the correct tense to complete the sentences.
Kristin is in the shower. She ______ her hair.
Kristin ______ her hair every other day or so.
Tony usually ______ in the front row during class.
Today Tony ______ in the last row.
Lars ______ the night shift on weekends.
Lars is not home now. He ______ a double shift.
After six days of rain, I'm glad that the sun ______.
Every morning, the sun ______ in my bedroom window and wakes me up.
Babies ______ very quickly. Newborn babies are very different from three-month olds.
Your baby ______ so fast. She isn't a newborn anymore!
Please be quiet. I ______ to concentrate on my math homework.
Each day, our math teacher ______ to explain the material clearly, but I am very confused.