What _______ the foreign experts most is that the new factory is perfectly environment-friendly.
After a year, doctors diagnosed him with a disease so rare ________ it affects just one in 8 million children.
________ you need something, please don't hesitate to let me know.
One more week, ________ we will accomplish the task better.
He never thought that his success came ________ he least wanted it.
I was completely terrified when I suddenly saw a dark figure leaning ________ the door in front of me.