Each of these sentences below is grammatically incorrect. rewrite each sentence correctly.
1. they are as old as us.
2. can it be them?
3. he had difficulty with the store’s management.
4. i, who’s older, know better than you.
5. is there any criticism of arthur going?
6. everybody tried their hardest.
7. i do not like these sort of cakes.
8. he said that venus was a planet.
9. i wish i was a clown.

Explanation:

1. as we (are)

2. it be they. Sounds weird but that is the correct agreement.

3. I think 3 is correct. The apostrophe is in the right place.

4. I, who am older, know better than you.

5. I don't see anything wrong with 5. You might want to rewrite it as Is there any reason why Arthur shouldn't go?

6. Everybody tried his (or her) hardest.

7. like those sorts of cakes.

8. Venus is a planet. There is nothing wrong with the sentence.

9. This is a very odd rule of grammar. It should be I wish I were a clown.

its confident and professional

one of the central themes of edward abbey's work has been his staunch opposition to the glen canyon dam on the colorado river that created lake powell, destroying stunning scenery and wildlife habitat, endangering many rare species of fish and animals, and also irreparably destroying many important archaeological sites which provided information about the early inhabitants of the united states.