When parents come to visit our school last week, Tom _______ them into the classroom.
---Would you mind if I record your lecture? ---______. Go ahead.
Russia lies______ the north of China.
As you can see, the number of the students ______rising these days.
---Is it Jim who is driving the new car? ---Probably. I know he has recently bought a ______ car.
According to the situation, they found three different ______ to the problem.