-- What’s the matter with you?--- _______ the window, my finger was cut unexpectedly.
We should consider the students’ request________ the school library should provide more books on popular science.
He was heard________ three songs in the next room.
-Young man, come off the grass; we forbid________ on the grass here. -Sorry, I didn’t notice it.
Christina wasn’t saying anything, but the professor smiled at her _______she had done something very clever.
No matter what I do, my efforts ________always end in failure.