I. 1) -B)
2) - C)
3) - B)
II. 1) ... has been studying....
2)... is ...., ....is having...
3) ....like...
4) ... has watched....
5) ...have been studying
6) ...speaks...
7) ...focus....
8)... is taking...
9)... has been tutoring
10) keep
III.1- to listen
2)...writing
3)...watching...
4)...to read
5)...to develop...
IV. 1) I have been studying English for many years.
2) At lessons we do different kinds of work: listen to records, make dialogues, read and speak English.
3) I like to make sentences, but grammar is difficult for me.
4) Now I am reading a text, and writing out new words.
5) I have just translated some sentences.
.