It's strange _____________ he didn't come yesterday.　　

[    ]　　

A. why   B. that   C. which   D. how　　

____________ the moon moves round the earth.

[    ] 　　

A. It knows by all why　　  B. It knows to all why 　　

C. It's known to all that   D. It is known by all that　　

You have no idea _____________ worried his mother was!

[    ]

A. that   B. how   C. what   D. whether

____________ is a pity he wasn't there that day.　　

[    ]　　

A. This   B. That   C. It   D. There　　

________ of you comes in first will receive a prize.

[　　]

However much ________, it will be worth it.

[　　]

Since you've broken the law, you won't escape ________.

[　　]

-Are you satisfied with her answer?

-Not at all. It couldn't have been ________.

[　　]

I won't think ________of him because of his shortcomings. He is a good boy after all.

[　　]

The experiment________ the discovery of a new element.

[　　]