You are welcome Abla. I haven´t met any Turk that made that mistake yet. A Turk would put dative automatically even when he/she is talking in his/her dream.

" KAYIN "  THE HOLY TREE

" Kayın " is a holy tree in Turkic Mythology. It is belong to beech family, and called with various names such as  " Fagus sylvatica or European beech or common beach "

For ancient Turks, it was considered as a "Life Tree", symbolizing the underground with its roots, the earth with its body and the skies with its branches and leaves.

Its skin was used to construct traditonal tents. Its skin is very strong and easy to peel. 

In Divan-ı Lugati´t Türk [ The oldest dictionary of Turkic dialects ], this word [Kayın] means "Woman". Because, woman is symbol of productivity, it may be relation with the name of this tree.

If you make a little cut on its body, you´ll get like a milky juice called "kaynıng sünezi” which means "kayın suyu/sütü" . People in those times used to drink this considering it nutritious just like mother´s milk. 

Aferin Kedinero !  I forgot to put "beri" for the first two questions, Pardon.  

Fill in the blanks with postpositions kadar, sonra,beri, önce, için ,göre. [ You may use each of them more than once ]

1. Onlar 2014´ten_________burada oturuyorlar.

2. Türkiye´de kadınlar 1934´ten ________ oy verebiliyorlar.

3. Saat altıya _________ kafede seni bekledik !

4. Saat altıdan _________ kafede seni bekliyoruz.

5. Dersten ________ nereye gidiyorsunuz ?

6. Maalesef ben senin ___________ iyi Fransızca konuşamıyorum.

Just say " Eşimin ailesi " .  We dont have any other special word for that as far as I know.

Those terms  refer to ´´ odd numbers ´´ [Tek sayılar ] and "even numbers" [ çift sayılar ] 

I have just looked at " Ankara Opera Salon seating plan" and in that plan it is pointing odd numbers as " tekler" and even numbers as "çiftler " 

Yes, it is correct.  In that sentence, dative has to be added to the name of the place cus of "gitmek". In that website, there is couple of more grammar mistake. So you are right.

Kendine saygın yoksa ve kendini başka kadınlara gidip onlarla gönül eğlendirme ihtiyacında hissediyorsan tadını çıkar o zaman. Ama gün gelecek pişman olacaksın. Zira seni seven sana sadık. Yani ben her zaman sana sadık kaldım ve kalacağım da. Ama gün gelecek yüzüme bakmak zorunda kalacaksın.

"Zordayım" is more like " I am in a difficult situation" 

You can say " Şu an sorunların ortasındayım, çok zorluklar yaşıyorum " 

Some Easter terms in Turkish 

Paskalya - Easter

Paskalya yortusu - Easter day [Easter celebration]

Paskalya yumurtası  - Easter egg

Paskalya çöreği -  Easter bread.

Paskalya tavşanı - Easter Rabbit [ Easter Bunny ]