In the future, senior citizens will be able to go anywhere using high-tech cameras to the

发布时间：2020-08-16 21:57:52

In the future, senior citizens will be able to go anywhere using high-tech cameras      to their head.
A. attaching
B. attached
C. to attach
D. attaches

网友回答

A. attaching
(答案→)B. attached
C. to attach
D. attaches
解析：考查非谓语动词用法。Camera与attach构成被动关系，使用过去分词。
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