It is said that the iron and steel works _____not far from here, but now there ______no means of finding it out.
________ I regret most is that I have promised to make friends with the dishonest girl.
We can find out ________ all the excitement is about by playing QQ's “Happy Farm”.
I can't figure out ________ it is that makes him so difficult at school.
We all held the view ________ the book said was right.
—How do you think I can make up with Jack? —Set aside ________ you disagree and try to find what you have in common.