让步
_____ you choose to contact us, you can expect our efficient and helpful service.
\_\_\_\__ you choose to contact us, you can expect our efficient and helpful service.
Both sides show no signs of backing down.
Both sides show no signs of backing down.
_____ uncomfortable it may be, proper protective gear absolutely must be worn by anyone using the equipment.
\_\_\_\__ uncomfortable it may be, proper protective gear absolutely must be worn by anyone using the equipment.