199. Choose the right verb. It _______ in computer-aided design, maps, 3-D technical illustrations, etc.
is used
be used
been used
were used
200. Choose the right verb. It _______ for high-quality publications.
is used
be used
been used
were used
201. Choose the right verb. Laser printers ______ fast and _______ a high resolution of 1,200 to 2,400 dpi.
are / produce
is / produces
has / produced
have / produce
202. Choose the right verb. A laser _______ like a photocopier; a powder called toner ________ to paper by an electrostatic charge.
works / is attracted
work / are attracted
worked / is attracted
working / is attracted
143. Which verb forms are Present Perfect?
have done / has done
had done / do
has do / have do
had done / has done
144. In which sentence is the Present Perfect used correctly?
I have bought a new computer.
I has bought a new computer.
I have buyed a new computer.
I had bought a new computer.
145. Choose the right tense form. They ______ the bike. It looks new again.
have cleaned
has cleaned
cleaning
clean
146. Choose the right tense form. ______ you ever ______ magic tricks?
Have / done
Has / done
Did / do
Do / do
147. Choose the right tense form. The children ______ their room. It's still dirty.
have not cleaned
has not cleaned
have not clean
has not clean
148. Choose the right tense form. Jack ______ the window of the gym this morning.
has broken
has breaked
has broke
has break
149. Choose the right tense form. Steven _____ across the Altantic.
has never flown
have never flown
has never flew
have never flew
150. Choose the right tense form. We _____ the film at home.
have already seen
has already seen
have already saw
has already saw
151. Choose the right tense form. They _____ their books out yet.
haven’t taken
have taken
haven’t took
hasn’t taken
125. What are the internal peripherals of a computer system?
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