Now more and more people have come to know the role that trees __________ in our natural environment.
The two boys fought and fought until one ______.
He will _____ our class to sing at the school singing contest.
They told us that these small apples are often sweeter than big ____.
The girl ____ a beautiful skirt has told me the news. Which is not right?
“Is there anyone in your class ____ the name of Mary? ”____.