-Do you know who took the students to the art and science fair ?-Well, Mr. Smith ____ .
Mrs Green are very grateful to the neighbour _____ helped her child out of the fire.
—You are leaving your school.How do you like it?—Very much, of course, I this school since I moved here
—Do you think the first problem in this math test difficult?—Yes.I could work it out.
—_____ good news he brought us yesterday!—Yes, all the students were very excited.
the students in this school is about four thousand, of them are boys.