On account of this microchip, Dave Williams can do the followings EXCEPT ______.

参考解析：

细节理解题。根据文章第二段第四句至第八句“By registering the tag with a variety of devices, he can use it to trigger certain functions, such as transferring his contact details to a friend’s mobile phone. ‘I have the world's worst memory,’ says Williams. The fact that he now has a gadget on him at all times that opens doors and unlocks his computer — one that he can’t leave at home or forget — is a huge advantage. ‘It’s also fun to give someone my number and email address by touching their phone to my hand.’”可知，通过向多种设备注册这个标签，他就能直接触发特定功能，例如将自己的联系信息发送到朋友的手机上。“我拥有全世界最差的记忆。”威廉姆斯说。他现在拥有一个随时都能打开门和电脑的设备，而且不会落在家里，也不会丢失——这已经成为一个巨大的优势。“我只要动手触摸一下别人的手机，就能把我的号码和电子邮箱发送给他们，这也很有趣。”故选C。