The mobile phone has influenced our life a lot since it_____. A. invents B. is invented C. was invented
The student is _________ see the teacher because he_________a mistake.
I_________ a worker, but now I am an actor.
He must be in the room, because the light in the room is__________.
Girls are afraid of math .They think they have some learning it .
His parents were worried that he too much time chatting on line.