If you have a door to your office, make good use of it. 40 .If someone knocks and it’s not an important matter. excuse yourself and let the person know you’re busy so they can get the hint(暗示) than when the door is closed,you’re not to be disturbed.
A.If you’re busy, don’t feel bad about saying no
B. When you want to avoid interruptions at work
C. Set boundaries for yourself as your time goes
D. If you’re in the other person’s office or in a public area
E. It’s important that you let them know when you’ll be available
F. It might seem unkind to cut people short when they interrupt you
G.Leave it open when you’re available to talk and close it when you’re not
解析：本题考查的是对段中句的选择。设空处的前一句建议要充分利用办公室的门来避免受到打扰，而选项G中的it正好指代前句中的a door, 再根据选项G中的leave it open，close it以及该空后一句中的knocks等词汇的搭配使用，可判断答案为G。
