Why did you ________ the boy’s help just now—I can’t ask others for help as long as I meet a difficulty. I need to learn to help myself out.
I have ________ in learning English and I’m so worried. Could you help me with it—Sure.
I want to know ______ for theclass yesterday morning.
When did your father ____ your mother
You’d be exposed to a lot ____ pollution if you moved to a town with pure water and air. [ ]