It is dangerous ____ you ______ a close look at the tiger in the zoo.

下列各组句子中，不全含有通假字的一组是（ ）

She cared more about her students than her own healthThat’s why two years passed _____ she was treated for breast cancer

Is Mrs.Smith in—I’m afraid she isn’t．Would you like to ________ a message

Jack’s parents hardly have any spare time for him, ________they– ________, that’s why Jack often feels lonely at home.