Помогите сделать, пожайлуста.

1. Complex calculations ______ with the help of a computer.
am carried out
are carried out
were carried out

2. A special counter wheel (счетное колесо) for an arithmometer ______ by a Russian engineer V.T. Ordner in 1874.
is constructed
was constructed
will be constructed

3. The answers of computations ______ often in the form of tables.
are expressed
is expressed
were expressed


4. Small spots on a surface inside a computer ______ magnetically.
are polarized
had been polarized
was polarized


5. By means of instruction any computer ______ what operations to perform.
have been told
is told
will be told


6. All instructions ______ in registers, the units of hardware.
are recorded
is recorded
record


7. Any information ______ by the binary system.
are represented
is represented
represents


8. Numbers or instructions ______ for solving a problem by a computer.
are required
were required
will be required


9. Several computing units ______ by M.V. Lomonosov for computational science.
had been invented
have been invented
were invented.