поставить в нужную форму Exercise 6. Put the verbs into the correct tense form:
a. In the nearest future digital communication network (to allow) to process and transmit
voice, computer data and video images.
b. Invention of the laser and thin silicon fibres (to make) it possible to transmit pulses of light
without amplification and regeneration.
c. New high-capacity optical transmission systems (to operate) between many major US
cities.
d. Another revolution (to concern) optical disk technology.
e. An optical disk (to be) capable of storing about 1000 times more information than a plastic
disk of the same size.
Explanation: In this sentence, we are talking about a future event, so we need to use the future tense. The verb "allow" needs to be changed to "will allow" in order to indicate that it will happen in the future.
b. The invention of the laser and thin silicon fibers has made it possible to transmit pulses of light without amplification and regeneration.
Explanation: In this sentence, we are talking about a past event that has an impact on the present. The verb "make" needs to be changed to "has made" to show that the invention happened in the past but its effect is still present.
c. New high-capacity optical transmission systems are operating between many major US cities.
Explanation: In this sentence, we are talking about a current state. The verb "operate" needs to be changed to "are operating" to indicate that it is happening at the present moment.
d. Another revolution will concern optical disk technology.
Explanation: In this sentence, we are talking about a future event. The verb "concern" needs to be changed to "will concern" to indicate that it will happen in the future.
e. An optical disk is capable of storing about 1000 times more information than a plastic disk of the same size.
Explanation: In this sentence, we are talking about a general truth or a fact. The verb "be" is used in its present tense to indicate that it is a characteristic of optical disks in general. Therefore, no tense form change is needed.