22.Some people are worrying about the possibility ________ cellphones could be responsible for a range of illnesses, from rashes to brain tumors.
We are supposed to __________newspapers, magazines and other related books when writing a report.
The, __________at 7:30 pm last night, was followed by a brief dinner.
Taking notes is important in class, but it is not necessary to __________every word the teacher says.
—Could you buy me the latest TEENS Senior 2 Edition? —__________after I finish my lunch?
—Excuse me, where is Johnson? —He cannot go home, as his book is lying __________on his desk.