— Mike, what did our monitor say just now?—Every student as well as teachers who are to visit the museum _____ asked to be  at the school gate before 6:30 in the morning. 

The number of people invited to the party ____ fifty, but a number of them ____ absent for different reasons.

—He is the only one of the students ______from the country in my class, and we have known for quite some time.—Where did you meet for the first time?     —It was on the farm ________ I used to work.

. The computer games you are addicted to _____ dangerous to students’ bodies and spirits.

 I think maths ____ very interesting.