I didn’t quite follow him because he explained the theory _____that is too abstract for me.
What my wish is to have a round-the-world_______after I retire.
I know you have much time. Please tell us about the news______.
--- Would you like to______ Mr. Zhang’s lecture this afternoon? --- Sorry, I have a class meeting to______.
It’s helpful to put children in a situation they can see themselves differently.
If I _________ ten years younger, I _________very happy.