CBSE Class 9 English Grammar Worksheets | Tenses

Fill in the blanks with an appropriate verb form.

Class 9 Tenses Worksheet

A collision 160 million years ago of two asteroids ………1……….. between Mars and Jupiter …………2……….. many big rock chunks hurtling toward earth, scientists ………….3……….. That catastrophe ………..4……….. the dinosaurs and many other life forms, and ……….5………. the way for mammals to dominate earth. The impact …………..6………… to have triggered a worldwide environmental cataclysm, expelling vast quantities of rock and dust into the sky, ………..7………… giant tsunamis, sparking global wild fires and leaving earth shrouded in darkness for years.

1. a) orbiting; b) orbited; c) orbit; d) orbits

2. a) sent; b) had sent; c) sends; d) sending

3. a) said; b) says; c) say; d) have said

4. a) eliminating; b) eliminated; c) have eliminated; d) is eliminated

5. a) paved; b) paving; c) have paved; d) pave

6. a) is thought; b) has thought; c) thought; d) think

7. a) unleashed; b) unleashing; c) unleashes; d) unleash

Answers

A collision 160 million years ago of two asteroids orbiting between Mars and Jupiter sent many big rock chunks hurtling toward earth, scientists said. That catastrophe eliminated the dinosaurs and many other life forms, and paved the way for mammals to dominate earth. The impact is thought to have triggered a worldwide environmental cataclysm, expelling vast quantities of rock and dust into the sky, unleashing giant tsunamis, sparking global wild fires and leaving earth shrouded in darkness for years.