1.
— My brother (is building) a house in the country. — Is he a builder? — No,
he just (likes) to do something with his hands. And then he is not (doing) it
alone. Two or three people (are helping) him.
2. — What are you (doing) this Saturday? Are you free? — Unfortunately, I (am working) this Saturday, though I
usually do not (work) on this day. And you? What are you (doing) this weekend? —
Fortunately, I am not (working), I (am resting).
3. — Are you serious or are you (kidding)?
— I (am trying) to tell you that you (are behaving/behjave) like a fool.
4. — Exams (come/are coming)
soon and we (are working) like maniacs. — But usually you do not (work) so hard,
as far as I know.
5. — What are you (looking) for in this site? — Our teacher
(says) that there (is) everything you need in the Internet. And I
(am writing) my graduation project at present. I (am going) to use as much
material as possible in it.
6. — Is your English (getting) better or worse? — I
(think) that it (is improving). And I am even (thinking) of studying it with a
native speaker. — Yes, I (see) that you are seriously (thinking) about your
future career.