_____ in his test papers，he didn’t notice my coming [ ]

Daniel, _____ play with the mobile phone when you’re walking in the street.

t remember how the tune goes, ______ I’llrecognize it when I hear it.

The idea has been in my mind for quite a long time that we ourselves are actually responsible for ________ happens in our life.[ ]

You see, “Food Safety” receives thousands of Internet hits a day.—Obviously, it has become one of the________ topics recently.