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VIII. Complete the sentences with the present perfect form (positive or negative) of the verbs
in brackets.
S+ have/ has + PII
1. I have had (have) four exams so far this month.
2. Mr Tan
(teach) in this school for over ten years.
3. You
(not stop) talking since you got here!
4. Scientists
(find) more than 30 unknown insects.
5. She
(not see) Nathan since he left the town.
6. Someone
(break) a window in our classroom.