d. 1978 -
8 Choose the best answer to complete the
sentences.
1. Young scientists
results if they had started working at physics
laboratories earlier.
a) mustn't have got
b) could have achieved
c) should have received
d) may take
7 Make up the sentences using the following
complex modal verb forms and word
combinations.
a. to create a new invention (could not have) _____
b. to discuss a matter (must have)
с to look forward to returning (must have)
d. to get into a research activity (can have)
2. Robert and Peter
scientific research experiments as they have
become known throughout the country with their
innovative invention.
a) can have obeyed
b) must have done
c) couldn't have got
d) might have done
e. to turn down the suggestion (must not have)
f. to get involved into (couldn't have)
g. to have an opportunity (must have)
h. to get something ready (could have)
3. Great scientists
practical productions after having worked at the
inventions for years.
a) could have created
b) can't have led
c) must have get
d) had to do
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