This English grammar exercise is meant for students of classes 8, 9 and 10. You have to fill in the blanks with an appropriate word or phrase.

Class 10 English Grammar Worksheets

Scientists ……………1………………. a planet ………….2…………… in theory can support life. The planet isn’t ……………3…………….. our solar system. It …………….4……………. a star called Gliese 581, …………..5………….. is about 116 trillion miles …………..6………… Earth. Astronomers have found extra solar planets in the past ……………7……………., but none seemed habitable. ……………8…………… are giant balls of gas. Many are …………….9…………. close to their fiery stars that water on them would boil away; …………….10………………. are so distant that water would freeze.

1. a) discovered; b) have discovered; c) are discovering; d) had discovered
2. a) who; b) what; c) that; d) whom
3. a) on; b) in; c) at; d) from
4. a) orbit; b) orbits; c) is orbits; d) has orbited
5. a) that; b) who; c) which; d) what
6. a) in; b) at; c) from; d) off
7. a) as well as; b) also; c) too; d) besides
8. a) most; b) most of; c) most of the; d) much
9. a) so; b) too; c)very; d) much
10. a) other; b) others; c) another; d) anothers

Answers

Scientists have discovered a planet that in theory can support life. The planet isn’t in our solar system. It orbits a star called Gliese 581, which is about 116 trillion miles from Earth. Astronomers have found extra solar planets in the past too, but none seemed habitable. Most are giant balls of gas. Many are so close to their fiery stars that water on them would boil away; others are so distant that water would freeze.