Present Perfect vs Past Simple

Choose the correct option in Past Simple.

When                            [did the accident happened, did the accident happen, have the accident happen, has the accident happened] ?

It               [happened, have happened] just half an hour ago. But it             [didn't be, wasn't be, weren't be, wasn't] the driver's fault. A dog          [run, ran, did run, have run, has ran] out onto the road and the driver           [have do, have done, did, has done] his best to avoid hitting the dog.

Choose the correct option in Past Simple.

              [Did you go, Did you went, Have you go, Have you gone] for a picnic last Sunday, Mike? - Yes, we           [have go, have gone, goed, went], but we                [didn't enjoyed, didn't enjoy, didn't enjoied, haven't enjoy] it. The weather                [spoiled, spoilt, spoiled/spoilt] suddenly and it              [started, did start, have started] raining, so we            [returnt, returned, did return] home.

Choose the correct option in Present Perfect.

              [Did you see, Have you see, Have you seen, Did you seen] Jill this week? - No, I         [haven't, didn't, hasn't]. I              [didn't meet, didn't met, haven't meet, haven't met] her since last month.