II. Personal / impersonal constructions
1 Choose the correct answer.
1) It (believe / is believed) that people originated from apes.
2) They (expect / are expected) him to come soon.
3) She (is thought / thinks) to be a true friend.
4) Dean ((is thought / thinks) to be a true friend.
5) He (is known / knows) much about his family's past.
6) The kids (were reported / reported) to be troublemakers in the neighbourhood.
7) The delegation (is expected / expected) to arrive soon.
8) The scientist(was expected / expected) to start his research .
9) Our parents (think/are thought) to set off to London in some days.
10) The convicts(were reported / report) to escape yesterday. : Batman (to know) to fight crimes.
2) The river (to expect) to flood the town in spring.
3) My friend (to say) to be a true anti vandal leader in the city.
4) Our teacher (to consider) one of the best specialists in the country.
5) The district (to report) to be the most dangerous criminal area in the town.
6) Arthur Conan Doyle (to believe) to be one of the most talented authors of the past century.
7) She (to know) as the beast storyteller.
8) Agatha Christie (to consider) ye queen of detective prose.
9) They (to expect) to work out the easiest solution of the problem.
10) This idea (to say) to be the most useful for the development of the country.
2 Viruses can be classified according to the host cell they infect: animal viruses, plant viruses, fungal viruses,and bacteriophages (viruses infecting bacteria, which include the most complex viruses).
3 Another classification uses the geometrical shape of their capsid (often a helix or an icosahedron) or the virus's structure (e.g. presence or absence of a lipidenvelope).
4 A virus is a small infectious agent that can replicate only inside the living cells of organisms.
5 Viruses are found in almost every ecosystem on Earth.
6 Viruses cause a number of diseases in eukaryotes.
7 Viral infections in animals provoke an immune response that usually eliminates the infecting virus.
8 The evolution of viruses, which often occurs in concert with the evolution of their hosts, is studied in the field of viral evolution.
9 While viruses reproduce and evolve, they don't engage in metabolism and depend on a host cell for reproduction.
2 Then, she always has breakfast.
3 She doesn't leave the house early on Saturdays, so he has time to eat. At the moment, she is getting dressed to go down and have some eggs.
4 Mark always goes to Ben's house at the weekend. Right now, they are playing computer games .
5 Mark usually wins but at the moment, he isn't winning.
6 Dana is chatting with her friend online at the moment. She spends about an hour online every night. At the moment, she and her friend are talking about their school day. Her friend is telling her about her dance class.