--- Do you know the woman ____ is walking on the other side of the street?--- Oh, that’s my history teacher.
—Mr.Wu, please ________ the cost of the trip.—All right.
You’ll also get _______ on keeping fit.
I'm going to take him to some museums _______ he can learn more about China.
A high school is going to allow students ________ lessons in the afternoon.
—I hear there’s a good Chinese restaurant nearby.Why not _______ there for lunch? —OK, let's go.