We feel _____ our duty to make our country a better place.
I used to think that roses were ______ red or white, but now I know there are yellow and blue roses.
---Do you mind if I use your notebook for a while?---No, ________, please.
----Tony, do remember to send the report to the sales manager!----___________.
----What a mess! You need to clean the classroom ________ after school!----But the final exam is approaching!
_________ not to drive after drinking, some drivers are still trying their luck, which is really dangerous.