This reading passage ____ two letters written to an aunt of a teenage magazine.
— Has Jack finished his homework yet?— I have no idea;he __it this morning.
______ leaves the room last ought to make sure that the windows are closed and the door locked.
We should think of ways to stop the waste from the factory _____ our living environment.
The mistakes made by Chinese students are quite different from ________made by the Japanese students in English study.
___ are very deligent.