Пожалуйста помогите сделать задание! Даю 23 б!Open the brackets using Past

Пожалуйста помогите сделать задание! Даю 23 б!Open the brackets using Past Simple, Past Perfect or Past Continuous:
1. When I (to wake) up, it (to be) already ten o'clock. I (to call) my brother. Nobody (to answer). He already (to leave).
2. I (to go) up to the open window. The rain (to stop) and the sun (to shine) brightly. The birds in the garden (to sing). The morning (to be) fine.
3. When the rain (to stop) I (to look) out of the window and (to see) John who (to stand) under a tree waiting for me.
4. I (to sit) in an armchair and (to think) of my coming trip across the North Sea when the door suddenly (to open) and an old friend of mine whom I (not to see) for a very long time (to enter) the room.
5. She (to come) to see us just at the time when we (to have) dinner. It (to be) the first time I (to see) her.