Fill in the blanks to help the friendly roommate offer some much-needed assistance.

"Those boxes look incredibly heavy! I will carry the bottom one for you so you don't hurt your back. And wait a second, I will open the front door so you don't drop everything on the porch."

"Those boxes look incredibly heavy! I will carry the bottom one for you so you don't hurt your back."

We use "will" to volunteer or offer to do something for someone else, especially when we see they need help right now.

"And wait a second, I will open the front door so you don't drop everything on the porch."

Again, the speaker is spontaneously offering a helpful action, making "will" the correct choice.