2.                                        humans____________ animals can live without air.

二、用并列连词both ••• and…，not only ••• but (also)…，either ••• or…或neither ••• nor…填空

1.                                        Saturday____________ Sunday is OK. I will be free at the weekend.

8. My glasses are broken,_____________ I need a new pair.

7,1 know him,                              I can't remember his name.

6.  You can watch TV at home____________ go for a walk with me.

5.  It was too cold outside,_________ .__ . we stayed at home all the day.

4.  Every day, I can smell the flowers_____________ hear the birds sing.

3.  She is very busy,____________ she still spends some time taking care of sick animals.

2.  Work hard,____________ you'll fall behind.

一、用并列连词and, but, so, or填空

 1.  Let's help each other____________ learn from each other.