Put the verbs in brackets in the correct form, present perfect

Put the verbs in brackets in the correct form, present perfect or past simple 1.Where39;s your key? I don39;t know.I .... it(lose) 2.I ..... very tired,so I lay down on the bed and went to sleep(be) 3.Mary ........ to Australia for a while but she39;s back again now.(go) 4.Where39;s Ken? He ....... out. Ge39;ll be back in about an hour.(go) 5.I did German at school but I ....... most of it.(forget) 6.I meant to phone Diane last night but I ...... (forget) 7.I ....... a headache earlier but I feel fine now.(have) 8.They39;re still building the new road.They ..........(not/finish) 9.Is Helen still here? No,.... she out.(just/go) 10.The police ..... three people but later they let them go.(arrest)