вставьте There is или It is. .................... difficult to learn the words,................... a difficult word in this text,................... something nice in this box,..................... nice to see you again,............... a lot of snow in the forest ,................... snowing now.

It is difficult to learn the words. there is a difficult word in this text/ there is . something nice in this box. It is nice to see you again. there is  a lot of snow in the forest / It is  snowing now.

it is difficult to learn the words , there is a difficult word in this text, there is something nice in this box,  it is  nice to see you again, there is a lot of snow in the forest , it is snowing now