General Grammar Check 1

1. We still don’t know ………………………. Mars supports life or not.

that
as
whether

2. Scientists …………………………… that Mars might have supported life in the past.

suspect
are suspecting
have suspected

3. Mars is ………………………… arid and dusty.

present
presently

4. Characteristics like channels on the Martian surface indicates that the planet …………………………….. once very wet.

is
was
had

5. Scientists are …………………………… to learn about the history of water on Mars.

eager
eagerly
eagerness

6. Water is fundamental to the question of whether the planet has ever ……………………….. microbial or some other life.

support
supported
supporting

7. Life …………………………… we know it requires water.

as
like
Either could be used here

8. A fisherman once ……………………………… on the banks of a river.

lives
was living
lived

9. He ……………………………….. fishing every morning, but could never catch enough fish.

would go
went
Either could be used here

10. He ………………………………. a miserable life.

led
lead
leads

11. Then one day he ………………………………… a big fish.

catches
caught
has caught

12. The fisherman ………………………………. the fish to the market, but no one could pay the price he demanded.

takes
took
has taken