Выберите правильную форму герундия: 1. she is looking forward to (having sent, being sent) to moscow on business. 2. before (sent, being sent) to the warehouse, the cases were counted and marked. 3. i remember (giving, having been given) this instruction by the chief engineer. 4. i am surprised at your (having missed, being missed) so many lessons. 5. we insisted on the contract (having been signed, being signed) immediately.