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1. two new engineers just were introduced to the head of the department.2. i am sure i will be asked at the lesson tomorrow.3. they told me that the new student was spoken much about.4. he said that the grandmother's letter was received the day before.5. this new dictionary was sold everywhere now.6. all the texts were looked through yesterday and a single mistake was found.

5) they were at the party, were not they?

6) he will not be back, will he?

7) she could help us, could not she?

8) you have no mercy, have you?

9) we have some food, have not we?

10) he will be here, won't he?

11) it's not tasty, is it?

12) it was good, was not it?