The school _____you visited yesterday is the place ____I once learned .
I hope I will not be called on in class as I am not yet ________prepared.
— Why is the chemical plant closed? — Because large quantities of waste water ______ into the Yangtze River.
The task is very difficult. I wonder whether we will be able to finish it in the ________ of any other helpers.
As _________ teacher, you must believe that you can make ______ difference to the lives of your students.
the occasional visit, what else does Alan do for his kids?