I. Insert the suitable punctuation marks properly.

Here are the solutions to the questions:

I. Insert the suitable punctuation marks properly.

1. Do you know what I did last week**?**
2. We do a science experiment in the lab**.**
3. Abebe**,** Selam**,** Hana and Tigist are friends**.**
4. Wow**,** you are a clever student**!**
5. Do you have exam today**?**

II. Fill in the blank Spaces by using the appropriate word from the given box.
The words to choose from are: respect, come generation, ethnic, hygiene, describes, contaminate.

6. Variations are beauties they can be tourist attraction and ethnic of your culture.
7. Your language best describes of your culture.
8. Over 80 ethnic groups live in Ethiopia having their own language.
9. Both communal groups and differences should be respect.
10. We need to keep our personal hygiene.
11. Liquid wastes channeled to rivers and ponds contaminate the water.

III. Put the appropriate auxiliary verb to make a meaningful sentence. 12. My sister is baking a cake. 13. The Children are swimming in the pool. 14. She doesn't take care of her personal hygiene. 15. They don't like chatting. 16. She has long hair. 17. Is your mother baking bread this evening?

IV. Write the opposite meaning of the given words. 18. Garbage: $\boxed{\text{Treasure}}$ 19. Contaminate: $\boxed{\text{Purify}}$ 20. Accumulate: $\boxed{\text{Disperse}}$