18. Paragraph ③（ ）

• A、Animals help reduce your stress.

• B、Animals improve human relationships.

• C、Animals make your life more enjoyabl

• D、Animals can change your way of lif

• E、Animals help improve your eating habits.

• F、Animals help lower your blood pressur

30. 应填入

• A、They also learn ways to protect them.

• B、It protects the environment of an are

• C、They can do other things that are good for the are

• D、Its effects need to be further studie

• E、So there are likely to be more vacationing options availabl

• F、On the contrary,people think that it can be a wonderful adventur

A.matter	E.achieve	I.often
B.different	F.know	J.better
C.determination	G.smart	K.usually
D.only	H.next	L.heart