English is useful. Let’s try _______ best to learn it well.A. us B. our C. ourselves
—Jack, have you finished your homework _____? —Yes. I’ve _______ finished it.
Jenny is talking _____ in class. Please tell her to stop.
_____? We’re going sightseeing.
I want to buy a bike. At last I decided ____ a black one.
Where____ he ____ for his next vacation?