There is - для ед.ч., ther are - для мн.ч. Задавать вопросы надо: Is there/ Are there. Для исч. можно любое из 2-ч, для неисч. смотря на то, в каком они изначально стоят числе.
Nice to meet you. Where are you from ? Yes, I am. How old are you ? I'm twelve years old. I'm at school.
Hi Mark, how are you?I am glad that you wrote to me. You asked me about my family.My mother's name is Natalia. She is 31. She is an architect.My dad name is Michael. He is 33 years old. He is a businessman.And I have a little sister Lisa. She is only 3 years old.I would be glad if you write me again.Your friend<span>Ivan</span>
Конечно - Of course
Несомненно - Definitely
Преимущественно - Mainly
Расцвет - Prime
Сегодня - Today
В средневековье - In the middle age
Постепенно - Gradually
Важная часть - Important part
В то же время - In a same time
Купание в море - Swimming in a sea
Почтовая карета - Post coach
Today important part of study is knowledge.
Definitely smoking in a bad habit.