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English Exam Questions

English Grammar - 1

Find the correct answer. To see the explanations, click the "Comment" button below each question.

1. Some scientists ........... us that the thermal blanket around the globe ........... the average temperature of the earth to rise.

a) were warning / has caused
b) had warned / caused
c) warn / will have caused
d) have been warning / was causing
e) have warned / may cause

2. If transport costs .......... into consideration at the outset, the plant ........... far from its present site.

a) will be taken / are being built
b) were taken / had been built
c) have been taken / have been built
d) were being taken / will be built
e) had been taken / would have been built

3. The first laser ......... in 1960 by Maiman almost half a century after the publication in 1916 of Einstein's theory of radiation which ......... the possibility of laser operation.

a) has been demonstrated / had shown
b) had been demonstrated / showed
c) was demonstrated / showed
d) demonstrates / was shown
e) was being demonstrated / shows

4. Researchers disagree ........ whether a large ocean existed on Mars, but one thing is certain: Martian geology is turning ...... to be strange and complex.

a) of / round
b) in / over
c) for / up
d) on / out
e) about / in

5. Species become endangered and even extinct ....... a variety of reasons, many of which are related ....... human activities.

a) over / through
b) for / to
c) within / of
d) with / for
e) in / with

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