Integrated Grammar Exercise for CBSE Class 10

Complete the following sentences using an appropriate word or phrase.

A panel of scientists …………1……………. by America’s leading scientific advisory group says the hunt ……….2………… extraterrestrial life should be greatly expanded to include ………….3…………. they call ‘weird life’: organisms that lack DNA or other molecules found in life ………4………… we know it. The scientists concluded in their report that life is possible in forms different from …………5………… on earth. Nasa has long looked to life ………….6…………. earth to guide its search for life in other worlds. Planets and moons that have hints of water ………..7…………. been ranked high on the list of potential site for life-detection missions. …………8…………. there is good reason to suspect that other kinds of chemistry could support life as well.

1. a) convenes; b) convened; c) convening; d) have convened

2. a) of; b) off; c) for; d) to

3. a) which; b) that; c) what; d) who

4. a) like; b) so; c) as; d) that

5. a) that; b) this; c) those; d) these

6. a) in; b) on; c) at; d) within

7. a) has; b) have; c) are; d) had

8. a) but; b) though; c) even though; d) despite

Solution

A panel of scientists convened by America’s leading scientific advisory group says the hunt for extraterrestrial life should be greatly expanded to include what they call ‘weird life’: organisms that lack DNA or other molecules found in life as we know it. The scientists concluded in their report that life is possible in forms different from those on earth. Nasa has long looked to life on earth to guide its search for life in other worlds. Planets and moons that have hints of water have been ranked high on the list of potential site for life-detection missions. But there is good reason to suspect that other kinds of chemistry could support life as well.