Our head teacher often __________.
-Could you please help me ______ when the plane will take off?-With pleasure.
It’s not easy for primary students ______ themselves freely in class.
-Don’t stay up late, Dale! It’s bad for your health.-______.
I know nothing about American history. So when I ______ about it, I couldn’t answer it at all.
Our school is not very big. There are only about ______students.