Помогите с английским, пожалуйста) Fill in the blanks with the proper form of the proper modal verb: 1. I rang you up

1. I rang you up last night but I could not get you on the phone. 2. I had no change about me, so I could not take a bus and had to walk to the office. 3. We could not start the loading because the holds were not clean. 4. We did our best to avoid the damage but we couldn\'t. 5. We had to wait for the train rather long.6. We didn\'t need to buy any provisions at our last port of call as we had everything in our store room.7. He could not tell you about it as he didn’t see you yesterday.8. He caught a bad cold and had to stay at home for a fortnight.9. The work was not easy and was to be done quickly.10. They knew there was a trouble with the engine but was not able to locate it.11. They didn\'t need to shift to another berth as there was no reason for it.12. Must you take a pilot to enter the port?