Class 9 Interact With English Workbook Solution | Unit 1 Verb Forms Simple Present and Present Perfect Tense

Exercise 2

Simple present and present perfect tense

Use the simple present tense to talk about facts, general truths and habits.

Use the present perfect tense to talk about an action or situation that started in the past and has continued up to the present. We also use the present perfect to talk about finished actions whose effects are still felt in the present. The present perfect is common with the time expressions ever, before, never, yet, already, up to now, so far, recently etc.

Class 9 Interact With English Workbook Solutions – Unit 1 Verb Forms – Simple Present and Present Perfect Tense

Here is a news story about how crops are saved by climate-proofing them. Complete it by choosing the right words from those given in the brackets.

Among the most worrying aspects of climate change today (a) ……………….. (is / has been) the effect it (b) ………………. (has had / have had) on the food supply of the world. Scientists (c) …………….. (have focused / focus) their attention and efforts on increasing crop yield and improving crop resilience. Asia and Sub-Saharan Africa (d) …………….. (have been / are) the most affected today. Their population (e) ………………. (is / has been) the world’s fastest growing rice consumer. The most vulnerable agricultural systems (f) …………….. (are / have been) the rain-fed uplands and lowlands that form 80% of total rice land. Until recently, scientists (g) ……………….. (have focused / focused) on improving crop yields, and in a relatively short period of time (h) ……………. (give / have given) us higher yields. Warning reports of increased droughts and floods (i) …………………. (shift / have shifted) scientists’ attention towards making crops ‘climate-proof’.

Solution

Among the most worrying aspects of climate change today (a) is (a fact) the effect it (b) has had on the food supply of the world. Scientists (c) focus (a fact) their attention and efforts on increasing crop yield and improving crop resilience. Asia and Sub-Saharan Africa (d) are (a fact) the most affected today. Their population (e) is (a fact) the world’s fastest growing rice consumer. The most vulnerable agricultural systems (f) are (a fact) the rain-fed uplands and lowlands that form 80% of total rice land. Until recently, scientists (g) have focused (up to now) on improving crop yields, and in a relatively short period of time (h) have given us higher yields. Warning reports of increased droughts and floods (i) have shifted scientists’ attention towards making crops ‘climate-proof’.

2.1

Answer the following questions based on your reading of the passage above.

a) What have been the most worrying aspects of climate change?

Answer: The most worrying aspect of climate change is the negative effect it has had on the food supply of the world.

b) What do scientists today focus on?

Answer: Today scientists focus their attention on making crops ‘climate proof’.

c) Where is the negative impact of climate felt most?

Answer: Asia and Sub-Saharan Africa are the most affected today.

d) What have the scientists been focusing on so far?

Answer: Scientists have so far been focusing on improving crop yield and crop resilience.

e) Why has their attention shifted?

Answer: Their attention has shifted because of warning reports of droughts and floods.

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Manjusha Nambiar

I am the founder and editor of http://www.perfectyourenglish.com, http://www.ielts-practice.org, and http://ncertguides.com

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