The reason ____ I have to go is _____ my mother is ill in hospital.
I ______ an old letter while I was searching my drawer.
Before taking the photo ,_______ the focus of the camera.
They were making a plan to help those students _____, which attracted me.
We didn’t know you were in trouble at that time,_____ we would have given you a hand.
We are invited to a party _______ in our club next Friday.