1. Identify the present perfect: 'The scientists have discovered new species.'

• have researched

• have discovered

• have studied

• have found

2. Choose the correct tense: 'I (have seen/have been seeing) the Northern Lights many times.'

• will see

• have seen

• saw

• have been seen

3. Formulate a sentence: 'The rainforest (has provided/has been providing) us with oxygen for millions of years.'

• The rainforest has been providing us with oxygen for a short time.

• The rainforest has provided us with oxygen for millions of years.

• The rainforest has provided us with carbon for millions of years.

• The rainforest provides us with oxygen for millions of years.

4. Use the correct time expression: 'They (have lived/have been living) in the mountains since 2010.'

• are living

• have been living

• lived

• have lived

5. Identify the present perfect continuous: 'The researchers have been studying the effects of climate change.'

• have been studied

• have been studying

• have studied

• are studying

6. Differentiate the tenses: 'We (have visited/have been visiting) national parks every summer.'

• have visited

• have been visiting every winter

• have visited national parks every year

• have visited every summer

7. Complete the sentence: 'The ocean (has changed/has been changing) significantly over the last century.'

• has remained the same

• has been changing

• has been altered

• has changed

8. Use the correct tense: 'I (have hiked/have been hiking) in the Himalayas for two weeks now.'

• have been hiked

• have been hiking

• hiked

• have hiked

9. Identify the present perfect: 'Many animals have adapted to their environments.'

• have adapted

• have been adapting

• adapted to their environments

• have adapted to

10. Choose the correct tense: 'She (has painted/has been painting) landscapes of nature for years.'

• has painted

• was painting

• has been painting

• is painting