1. 1. can tell, 2. couldn't take, 3. can you help, 4. could stand, 5. won't be able to play, 6. couldn't sleep, 7. won't be able to finish
2. 1. Can she read music?, 2. Could you see the sea?, 3. How much can he afford (to spend)? , 4. When will he be able to walk again?, 5. What can it do?, 6. When will he be able to start?, 7. How many languages could she speak?
3. 1. This letter was posted last Friday., 2. The animals were given some food., 3. They were invited to Raul and Sharon's wedding. 4. All the flights were cancelled because of the weather., 5. This chair was made in Italy in the 16th century., 6. We were warned to stay indoors until morning., 7. A lot of money and jewellery were stolen from their house.
4. 1. More than fifty people were arrested by the police., 2. The store was opened at exactly 9 a.m., 3. I was paid a lot of money to do the job., 4. We weren't met at the airport., 5. Everybody was rescued from the ship., 6. All the classrooms were cleaned yesterday.