Помогите пожалуйста!
Open the brackets using the correct from of the infinitive. Translate the sentences into Russian.
1. George must (be) pleased that he has passed his examination.
2. I found this baby bird at the foot of the tree. It must (fall) from a nest.
3. During the storm the captain was on the bridge the whole time. He must (be) exhausted afterwards.
4. If Fred left here at four o’clock, he must (be) home by now.