1 . The ________ (absorb) of vitamin D is essential for maintaining strong and healthy bones. (所给词的适当形式填空)

2 . His work suffered because of his total ________(absorb) in sport. (所给词的适当形式填空)

3 . Exercise can promote _________ (absorb) of nutrients by the body. (所给词的适当形式填空)

4 . Noise control materials can be tested in terms of sound ________(absorb). (所给词的适当形式填空)

5 . Both scattering and_____(absorb) of light make an object look different from other objects around it, so you can see it easily. (所给词的适当形式填空)