2. 连词成句，将对话补充完整。
Mark: Hi, Evan. What do you like doing?
Evan: I like swimming very much! How about you?
Mark: I like swimming too. (1) ?
(any, Do you, swimming safety rules, know)
Evan: Sure. Before swimming, (2) .
(warm up, we, first, should)
You can stretch (伸展) your arms and legs.
Mark: Yes. (3) . It’s not safe.
(shouldn’t swim, we, in the river, And)
Evan: Right. We shouldn’t eat too much before swimming. You may feel uncomfortable (不舒服的).
Mark: That’s a good point. What else?
Evan: Never swim alone (独自). (4) .
(should, You, swim with, always, your parents)
Mark: Yes. We should also listen to the lifeguard (救生员). They can keep us safe.
Evan: Safety comes first. (5) .
(follow, together, Let’s, safety rules, these)
Mark: Hi, Evan. What do you like doing?
Evan: I like swimming very much! How about you?
Mark: I like swimming too. (1) ?
(any, Do you, swimming safety rules, know)
Evan: Sure. Before swimming, (2) .
(warm up, we, first, should)
You can stretch (伸展) your arms and legs.
Mark: Yes. (3) . It’s not safe.
(shouldn’t swim, we, in the river, And)
Evan: Right. We shouldn’t eat too much before swimming. You may feel uncomfortable (不舒服的).
Mark: That’s a good point. What else?
Evan: Never swim alone (独自). (4) .
(should, You, swim with, always, your parents)
Mark: Yes. We should also listen to the lifeguard (救生员). They can keep us safe.
Evan: Safety comes first. (5) .
(follow, together, Let’s, safety rules, these)
答案：(1) Do you know any swimming safety rules?
(2) we should warm up first
(3) And we shouldn't swim in the river
(4) You should always swim with your parents
(5) Let's follow these safety rules together
(2) we should warm up first
(3) And we shouldn't swim in the river
(4) You should always swim with your parents
(5) Let's follow these safety rules together
解析：
本题考查连词成句补全对话，需结合对话语境、给出的提示词汇和五年级所学的基础英语句式规则排列单词：1. 第一空为一般疑问句，按照"助动词Do+主语you+谓语know+宾语any swimming safety rules"的结构排序；2. 第二空为陈述句，按照"主语we+情态动词should+动词短语warm up+副词first"的结构排序；3. 第三空为陈述句，按照"And+主语we+情态动词否定形式shouldn't+动词短语swim in the river"的结构排序；4. 第四空为陈述句，按照"主语You+情态动词should+频度副词always+动词短语swim with your parents"的结构排序；5. 第五空为祈使句，按照"Let's+动词follow+宾语these safety rules+副词together"的结构排序。