People have always been_______ about exactly how life on earth began.
Which city in England do you think may be called __________Shanghai of ________West?
I’d like Jane, _____Joan, to go to the farewell party on behalf of (代表) our class.
If we________ , we can realize the progress we have made in space research.
They arrived at the farmhouse, in front of which _________.
—Who are those with the flags? —A group________itself the League for Peace.