Complete the sentences using the present perfect form of the verbs in brackets and for or since

EXERCISE 4. COMPLETE THE SENTENCES USING THE PRESENT PERFECT FORM OF THE
VERBS IN BRACKETS AND FOR OR SINCE.
1. Our school _________________here ________________1990. (be)
2. That singer _________________confidence _________________she appeared on TV. (have)
3. This is my lucky pen. I _________________it _______________months. (have)
4. We _________________Quan ____________________three months. (not see)
5. I _________________a good song ____________________a long time. (not hear)
6. They _________________a DVD ___________________two years. (not buy)