, have you _____your decayed tooth—Yeah, but it’s terrible . I had _____most unpleasanttime at the dentist’s.

____,can I borrow your ruler______,my ruler is at home.

Why does the boy keep crying?— It is ______ he has lost his favorite car model

What do you think of Tina—She works ____ than anyone else in my class.

Here is such a difficult text _____ none of us can understand.Here is such a difficult text _____ none of us can understand it.