Выберите правильную форму герундия 1. She is looking forward to (having sent, being sent) to Moscow on business. 2. Before

1. She is looking forward to being sent to Moscow on business. 2. Before being sent to the warehouse, the cases were counted and marked. 3. I remember having been given this instruction by the chief engineer. 4. I am surprised at your having missed so many lessons. 5. We insisted on the contract being signed immediately.