Between the two, "Ducks swim in the water" makes the most sense. To fix the other sentence, you would say "The duck swims in the water".

Instruction: If contact lens "lost" in your eye

Yesterday my contact lens got lost under my eyelid. It has happened before, but every ("next" does not work here. It can be left out) time I get nervous and afraid of it getting stuck. After trying different methods for pulling out the contact lens, I developed my own method and I want to share it with you.
Step 1. You have to calm down. Don't be nervous. It won't have been worse yet. You do not want to make it worse. Somebody might think that contact lenses can get stuck behind your eyeball and cause an injury it but it is impossible. I read a lot about it. Nature - genial thing. It invented self-cleaning of eyes. This means that contact lens will be removed from your eye.
Step 2. When you are calm you can start operation deleting contact lens from the eye the removal process. Add more light Make sure there is enough light. Better if it be a table lamp A table lamp will work the best Take a mirror and see attentively, try to find the lens. Open your eyes wider, pulling your eyelid a little bit with fingers.
Step 3. If you don't see the contact lens in your eye I would advise you ti drop a few eye-drops into your eye. Move your eyes to the left, to the right, up, and down. Blink some times. Some people believe that blinking a lot for 2-3 minutes can help. After this step, the contact lens should be back in its place in the eye. Finally, you can remove it from your eye as usually
Step 4. If it didn't work repeat the process once again, starting with step 1.

This method helps me and I hope it will help to somebody else.

First day using italki!

Today is the first day I start using italki. I'm really pleased to know about this website. If there are any problems in my sentences please check it for me. I hope to write sentences everyday.

Welcome to Italki!

It is time to spend more time ("to" is not needed) writing

This is my second post on italki.

Now I know I only can send two "Add Friends" requests per day.

Yesterday I made one friend on italki, and we used wechat to chat for a while.

She has been learning Mandarin for one month. She is using a mobile app called ChineseSkill to build her basic skills on Mandarin. I think ChineseSkill is sort of similar to my English vocabulary building app -- BaiCiZhan.

BaiCiZhan is very popular in China in the English vocabulary building market section. Actually, it is No.1 in this market section.

I have been using BaiCiZhan for about 10 months. It is time to spend more time on reading and writing, instead of memorizing English words.

advertising

The high cost of ("the" is not needed here.) advertising is added to the product's retail price, which ultimately gets payed for by the customers.

Music that I like

I have different music that I like, and I want to write about it.
The Beatles: One of the most popular bands around the world (The comma was not necessary here.) with incredible music and creativity in their lyrics; my favorite Beatles song is You never give me your money.
Owl City: I recently discovered this songwriter and I liked his music immediately (quickly sounds weird in this context), he combines pop music with electronic. My favorite song is Fireflies.
Coldplay: I knew this band before and I liked a few songs, but recently I heard their new album and now I listen them almost every day. My favorite Coldplay song is Adventure of a Lifetime.
Mägo de Oz: This Spanish band is from a different genre than the others (Comma not needed here. You generally do not need to put a comma before "because".) because their members combine Celtic melodies with rock. My favorite song from this band is La Venganza de Gaia.

Thank you Jmat, Both of those links were helpful! I think I got it now!