Respuestas
Respuesta:
Ejercicio 1
1. The tap has been leaking since last week.
2. It's been snowing since last night.
3. The children have been studying for an hour.
4. Willie has been smoking since he was a teenager.
5. Andrea has been working in a bank since last April.
6. Mrs. Neville has been teaching French for 15 years.
7. Sue and Joe have been planning their vacation since last winter.
8. The mechanic has been fixing my car since this morning.
Ejercicio 2
1. Barbara hasn't been knitting a sweater. She has been making a scarf.
2. Ann hasn't been working overtime this week. She has been going home early.
3. Kevin hasn't been studying for his exam. He has been watching TV all evening.
4. Jenny hasn't been sending postcards to her friends. She has been writing e-mails.
5. Robert hasn't been drivingto work this week. He has been taking the bus.
6. Lisa hasn't been feeling well this week. She has been coughing a lot.
Ejercicio 3
1E
2D
3H
4F
5G
6J
7A
8I
9C
10B
Explicación: