判断题：人体呼出的气体全部都是二氧化碳。（   ）

用方框中所给单词的适当形式填空，每词限用一次。            

(1) Take some rest after lunch and you won't feel ____ in the afternoon. .

(2)When the child saw her parents waiting at the school gate, she ran ____  them.
(3)Don't ____  about your exams, everything will be fine.
(4)To protect____ , scientists suggest the people stop fishing in some parts of the ocean.
(5)My host family is really nice .They try____  best to make me feel at home .

刷牙时牙龈出血是坏血病的症状，应多食用（　　）

阅读对话，判断正误。

(Sarah is asking a policeman for help. )

Sarah: Excuse me.  Where is the Zhongbai Supermarket, please?

Policeman: It's next to the hospital over there.

Sarah: Is it far from here?

Policeman: No.

Sarah: How can I get there?

Policeman: You can walk there.

Sarah: Thank you.

Policeman: You're welcome.