1. 表示“因为”引导原因状语从句的三个连词有
2. Because 不能与连用
3. 回答 Why 的疑问句只能用
4. 的语气最强,______和______的语气较弱。

1. because，as，since
2. so
3. because
4. because；as；since

1. 在英语中，表示“因为”并引导原因状语从句的连词主要有because、as和since。because通常用于回答why的疑问句，表示直接原因；as和since则更多地用于陈述已知的原因或背景信息。
2. “Because”是引导原因状语从句的连词，表示直接原因。而“so”是表示结果的连词，用于引出由某个原因导致的结果。在英语语法中，“because”和“so”不能连用，因为这样会构成语法上的冗余或冲突。
3. 当回答Why的疑问句时，通常需要解释某个行为或情况的原因。在英语中，“because”是用来引导原因状语从句的连词，专门用于解释原因。
4. 在表示原因的连词中，“because”的语气通常最强，因为它直接回答了why的疑问句，给出了直接的原因。而“as”和“since”则更多地用于陈述背景或已知信息，语气相对较弱。

一、根据音标、汉语、首字母提示,填写所缺单词
1. It's a really useful book it explains everything very clearly.
2. The games (持续) only half the normal time.
3. He took a deep /breθ/, and began to climb the stairs.
4. I rang the door , but there's no answer.
5. He is praised by the teachers for his hard work.

1. because 2. lasted 3. breath 4. bell 5. highly

1. 句意：这真是一本有用的书，因为它把所有事情都解释得很清楚。根据句意及首字母提示，此处表示原因，填because。
2. 句意：比赛只持续了正常时间的一半。“持续”译为last，句子陈述过去发生的事，用一般过去时，last的过去式是lasted。
3. 句意：他深吸一口气，然后开始爬楼梯。根据音标/breθ/可知，此处填breath。
4. 句意：我按了门铃，但是没人应答。“门铃”译为doorbell，根据首字母提示，填bell。
5. 句意：他因为努力学习而受到老师们的高度赞扬。“高度地”译为highly，修饰动词praised，填highly。

二、用所给单词的适当形式填空
1. Daniel decided (play) the violin at the art festival since he is good at it.
2. I saw Andy (shout) loudly inside when I opened the door.
3. Your teacher must think (high) of you if you do your homework carefully.
4. I was late for school because there (be) too much traffic.
5. We'd better (hurry) since the opera will begin in 5 minutes.

1. to play
2. shouting
3. highly
4. was
5. hurry

1. 第一个题目考查的是decide的用法，decide后接to do sth表示决定做某事，所以填to play。
2. 第二个题目考查的是see的用法，see sb do sth表示看到某人做某事（全过程），see sb doing sth表示看到某人正在做某事。根据句意“当我开门时，我看到Andy正在大声喊”，所以填shouting。
3. 第三个题目考查的是think highly of这个短语，表示对某人评价高，所以high要用副词形式highly。
4. 第四个题目考查的是there be句型，be动词的形式由后面的名词决定。traffic是不可数名词，且根据was可知时态是一般过去时，所以填was。
5. 第五个题目考查的是had better do sth这个短语，表示最好做某事，所以填hurry。

三、短文填空：阅读下面短文,在空白处填入一个适当的单词或用括号内单词的正确形式填空
Sichuan Opera is one of China's (1) (old) and most popular local operas. It started at the end of the Ming and the beginning of the Qing dynasty. Different kinds of art forms were (2) (bring) in to mix with the local traditions, music and dances. Today's Sichuan Opera is a new form of art. It's best to watch a Sichuan opera (3) you visit Sichuan.
Sichuan Opera that is (4) (especial) popular in the southwest of China is the most powerful local opera. Face-changing is (5) (it) Top 1 Wonder. It is said that ancient people painted their faces (6) (drive) away wild animals. Sichuan Opera takes this ancient skill and perfects it into an art. Artists (7) traditional clothes dance around, shaking their heads up or down and changing the thin painted masks over their (8) (face). They do this so quickly that you will be left (9) (surprise) at how they can control the masks so skillfully.
It's not only a local opera but also a show of music, puppetry (木偶) and humor. In short, Sichuan Opera is well worth (10) (watch).

1. the oldest 2. brought 3. when 4. especially 5. its 6. to drive 7. in 8. faces 9. surprised 10. watching

1. 考查形容词最高级。"one of + the + 形容词最高级 + 名词复数"表示"最……之一"，old的最高级是oldest，故填the oldest。
2. 考查被动语态。主语"Different kinds of art forms"与动词bring是被动关系，用被动语态"be + 过去分词"，bring的过去分词是brought，故填brought。
3. 考查连词。句意：当你参观四川时，最好看一场川剧。此处表示"当……时"，用when引导时间状语从句，故填when。
4. 考查副词。修饰形容词popular用副词，especial的副词是especially，故填especially。
5. 考查代词。修饰名词"Top 1 Wonder"用形容词性物主代词，it的形容词性物主代词是its，故填its。
6. 考查非谓语动词。此处用动词不定式表目的，"paint their faces"的目的是"drive away wild animals"，故填to drive。
7. 考查介词。"in + 衣服"表示"穿着……衣服"，是固定搭配，故填in。
8. 考查名词复数。their后接名词复数，face的复数是faces，故填faces。
9. 考查形容词。"leave sb. + 形容词"表示"使某人处于某种状态"，修饰人用-ed形容词，surprise的形容词是surprised，故填surprised。
10. 考查非谓语动词。"be worth doing sth."表示"值得做某事"，是固定搭配，故填watching。

四、同义句改写
1. George was in a bad mood, so he left without saying anything.
George was in a bad mood, he left without saying anything.
2. She was angry because he said bad words about her.
She was angry his bad words about her.
3. Little Tom entered the classroom in a hurry just now.
Little Tom the classroom just now.
4. Amy was presented with an award for Best Student.
An award for Best Student Amy.
5. Tan Dun has succeeded in bringing Chinese and Western music together.
Tan Dun has Chinese and Western music together.

1. Because
2. because of
3. hurried into
4. was presented to
5. managed to bring

五、根据中文提示完成下列句子
1. 昨天我得到了两张免费的音乐会门票。
I got two yesterday.
2. 这次的音乐会持续了一个半小时。
This concert .
3. 由于路上车辆太多,我迟到了。
on the road, I was late.
4. 可惜的是,当我气喘吁吁地赶到时,音乐会已经开始半小时了。
Sadly, the concert had been on for half an hour when I .
5. 很多人都高度评价了这场音乐会。
Many people concert.

1. free concert tickets
2. lasted for one and a half hours
3. Because there was too much traffic
4. arrived out of breath
5. spoke highly of