Please check if these are the correct answers. Thank you for your help!
For #1, do I need to put a period after letter "s" for lbs.
1. Does the recipe require three lbs. of sugar?
2. _________responsible for the broken copy machine?
3. My best ____ truck stalled in our driveway yesterday.
4. Parks are good places to study __________ behavior.
For #5 and 6, I don't know which one is the correct answer.
5. Cross the ts in this document.
6. The books are our; the notebooks are Thomas