I want to talk to the boys ________ homework hasn't been handed in.

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This is the room in ________ we lived last year.

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His wedding, ________ takes place on March 2nd, is going to cost a lot of money.

[　　]

This is the best book ________ I have read so far.

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Is there anything ________ I can do for you?

[　　]

Don't read such books ________ you can't understand.

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"Extremely busy" means "so busy ___________ one's feet do not touch the ground" .

[    ]

A. as 　　B. so 　　C. thus 　　D. that 

_______is more important, to be healthy or to be wealthy?

[    ]

A. What 　　B. Which C. How 　　D. That

Blood is thicker than ________ .

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If you heat it, it will ________ a gas.

[　　]