I decide to pay a visit to you, but I don’t know whether it is quite _________ to you.
John was so sleepy that he could hardly keep his eyes ______.
— 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.