Passive reporting structures. Focus 4

Choose the correct option.

1) They _____                [are said to be, say there are] countless opportunities for mathematicians.

2) The Arabic numeral system _____                            [is thought to have evolved, is thought to evolve] in India.

3) The term 'mathematics' _____                                [is known to have been invented, has been known to be invented] by Pythagoras.

4) _____                 [There’s thought, It is thought] that the idea of 'numbers' evolved gradually over time.

5) It _____                 [could argue, could be argued]that mathematics contains the answer to all questions.

6) _____                   [It has known that, We know that]early civilizations developed different ways of writing down numbers.

7)Ancient Egyptians are considered _____                     [to contribute, to have contributed]to the development of mathematics.

8)Greek mathematics _____                           [is thought to have begun, has been thought to begin]with Thales of Miletus.

9)_____                      [We may believe that, It has believed that]both these theories are true.

10)They weren’t _____                                [thought to be involved, thinking to have been involved] in this case.

11) You are _____                           [expecting to have studied, expected to be studying]for your exams in the summer.

Rewrite the sentences in two ways, using the beginnings in brackets.

1)They say there are countless opportunities for mathematicians. (It… / There…)

Rewrite the sentences in two ways, using the beginnings in brackets.

2) They estimate there are around three billion users of the Internet. (It… / There…)