)ex. iv ask the questions using the words in brackets. 1. the new lab has just been opened (where). 2. he has been operating the machine (how long). 3. i find this procedure very helpful (who). 4. they are going to introduce the new system (when). 5. the student gave an example of social factors (why). 6. the sun’s rays will have struck the surface by early morning (what). 7. they have seen the rise of income in the diagram (who). 8. large deposits of coal were discovered in our country last year (when)
2.How long has he been operating the machine?
3.Who finds the procedure very helpful?
4.When are they going to introduce the new system?
5.Why did the student give an example of social factors?
6.What will the sun's rays have struck by early morning?
7.Who has seen the rise of income in the diagram?
8.When were large deposits of coal discovered in our country?