Question

こんにちは みなさん!

これはいくらですか?
あなたはげんきですか?
これ/それ/あれ は なんですか?

よろしくおねがいします.
どうもありがとう!　※どうもありがとう！→よろしくおねがいします。I hope you will take care of me.＝Thanking you in advance. To say どうもありがとう is strange because you haven't known whether someone gives you a favor. It might be a correct expression in English. But in Japanese, we don't say "どうもありがとうThank you" before we know someone gives us a favor.You have already written よろしくおねがいします. So just delete  どもありがとう！.

※This is a practice to make question sentences in Japanese, isn't it? If so, you'd better change the title to "Practice of question sentences".