条件状语从句。故选A。

【点睛】此题如果I won't disappoint you.前用连词and连接，就是考查"祈使句＋and/or＋陈述句。"，就选B；此题也可以从非谓语动词角度考虑，逻辑主语为I，与give之间为被动关系，用过去分词given，句子也可以成立。

5.The ringing of the bell ______ the end of the class suddenly ______ their heated discussion.

A. meant, interrupted B. meant, interrupting

C. meaning, interrupting D. meaning, interrupted

【答案】D

【解析】

【详解】考查句子分析、非谓语动词和时态。句意：意味着课结束的铃声突然打断了他们热烈的讨论。第一空The ringing of the bell与mean之间为主动关系，故用现在分词作定语；第二空为句子谓语动词，根据句意可知用一般过去时。故选D。

【点睛】本题既考查谓语动词，也考查非谓语动词。首先分析句子可知，句中缺少谓语动词，且第二空应为句子的谓语动词。再确定第一空考查的为非谓语动词，然后判断作什么成分，再分析和修饰词之间的逻辑关系，最后选择用什么样的非谓语动词形式。

6.Both students and parents appreciate the great importance schools have _______ to eyesight protection.

A. reacted B. attended C. attached D. adapted

【答案】C

【解析】

【详解】考查动词短语。句意：学校对眼睛保护非常重视，对此学生和家长都非常赞赏。A. reacted反映；B. attended参加；C. attached附上；D. adapted适应。本句中，主句为Both students and parents appreciate the great importance；schools have ________ to eyesight protection为定语从句，先行词为importance，关系词that在从句中作宾语，可以省略。attach importance to为固定短语，意为"重视......"。故选C。

7.Peter's jacket looked just the same as Jack's，but it cost________his.

A. as much twice as B. twice as much as

C. much as twice as D. as twice much as

【答案】B

【解析】