Choose the answer that best fits each space.
1.
In
automated information systems the computers ____receive and at the same time
interpret and act on the date.
a)
has
to b) were c) must d)
are
2.
The
motor ____ have a powerful effect at the very moment the current is switched on.
a)
ought b) was c)
have to d) should
3.
The
first MHD installation is known ____ into operation in Moscow in 1971.
a)
to
have been put b) putting c) be put d)
put
4.
The
transformer is a device for ____ the electric current from one voltage to
another.
a)
change b) changing c) changed d) being changed
5.
Computer
scientists ____ the problems of machine translation of languages for a number
of years.
a)
are
studying b) have studied c) have being studying d) study