Many of us rely on our smart pho

Many of us rely on our smart phones for our everyday cameras. Our phones, however, collect lots of data 【21】 us, and camera software can automatically make a 【22】 of our location when we take a photo. This is more often a potential safety 【23】 than a benefit.
Let's start with the 【24】 . When you allow your camera to mark your location, photo management apps, 【25】 Apple's Photos and Google Photos, can automatically 【 26】 pictures into albums based on location. That's 【27】 when you go on vacation and want to remember 【28】 you were when you took a picture.
But when you're not traveling, 【29】 your location marked on photos is not great. Let's say you just connected with 【30】 on a dating app and shared a photo of your dog. 【31】 you had the location feature turned on when you took the photo, that person could 【32】 the data to see where you live.
Just to be 【33】, make sure the photo location feature is off by default (默认情况下). You 【34】 choose to turn the location feature on 【35】 to document your vacation, but remember to turn it off when your trip is over.

31.
A、If
B、Though
C、Unless
D、Whether
【正确答案】：A
【题目解析】：句意：如果你在拍照时打开了定位功能，那么这个人可以通过分析这些信息知道你的住址。if意为“如果”，though意为“虽然”，unless意为“除非”，whether意为“是否”。根据句意，故选A。