Some people are worrying about the possibility ________ mobile phones could be responsible for a range of illnesses, from rashes(皮疹) to brain tumors

a table earlier, we wouldn’t be standing here in a queue.

I am fond of music while my sister likes reading novelsIt seems that we have nothing ______

The door is open but nobody is in. Mary______have forgotten to lock the door.

Wang Gang shows no interest in all the subjects, and goes to Bingyu Internet Bar to surf the Internet every night!—Oh, that’s too bad. He is______ to fail in the final exam.