The sunglasses can ------ our eyes from the sunshine.

C.protect
protect ..from 保护..免于XX
keep ...from 把...隔离于（之外）；防止...
例：Keep the knife from young children.
We need to do something to keep him from hurting himself
stop ...from (doing sth) 阻止.做什么事
We must stop him from killing more innocent people.
prevent ...from :预防.
We should prevent the H7N9 from spreading further.