Modal Verbs: Could/Couldn't
Study the following grammar explanation.

Focus on Modal use: Modals are used to express advice, necessity, possibility, and suggestion. 
For each question below, fill in the blank with the correct grammar form using modals.

Example: I  _______ ______  _______ a lot more studying for the exam. 

 I  could have done a lot more studying for the exam. 

1.  I  _______ have told my sister about her new project.

2. They ______ make some important suggestions about your plan.

3. _________ he remember that you use cheaper fuel?

4. First of all, they _____ be ____________  make a new budget.

5. It ______ be that transportation is better now, look at the price!

6. I think it ______ be another good idea for your sister's project?

7. He _________ your great uncle   

8. ______ you give me an example?

9. Overall, what do you think _______ be done  for her project?

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