Hello,
I am not sure whether the several sentences make sense in term of grammar and semantics.
Can you give me a hand with checking them
Thank you for your help
1. There are a lot of motivations to encourage students to get a high grade on the exams.
2. Mots graduate schools of the United States require that international students' TOEFL score over 250.
3. A boss decides whether his company continues to engage an employee based on his job performance.
4. A struggling company chooses to merge another one in order to save personeel' cost, resulting in the large-scale layoff.
5. What parents do most for thier children is education and encouragement.
6. I strongly support that where the decision must be made between supporting arts and environmental protection, the environmnetal protection should take priority.
7. One thing I am able to improve my community is to volunteer to teach English for those who need it most.