1. (2025·连云港)
A.Since
B.Unless
C.Though
D.Until
Since
over 400 million adults are too heavy, China has made a plan to help its people with weight control.A.Since
B.Unless
C.Though
D.Until
答案：1. A 【解析】分析句子可知,“超过 4 亿成年人体重超标”是“制定计划来帮助人们控制体重”的原因,因此应用 since 引导原因状语从句。
2. —Jim has made
—It's hard for him to get high marks
A.so a; until
B.such a; before
C.so; while
D.such; unless
such
great progress in the Physics exam that his teacher feels surprised.—It's hard for him to get high marks
unless
he works hard enough.A.so a; until
B.such a; before
C.so; while
D.such; unless
答案：2. D
3. (2023·南京市联合体二模)—Happiness is about having each tiny wish come true.
—That's right.
A.If
B.Unless
C.Though
D.But
—That's right.
If
we work hard, we'll make our life full of happiness.A.If
B.Unless
C.Though
D.But
答案：3. A
4. 亮点原创·
A.Unless
B.If
C.Although
D.Whatever
Although
we can't stop nature from making its "moves", researchers in Tianjin University are building a simulation (模拟) facility to reduce the damage of earthquakes.A.Unless
B.If
C.Although
D.Whatever
答案：4. C 【解析】句意:尽管我们无法阻止大自然进行“活动”,但天津大学的研究人员正在建造一个模拟设施,以减少地震的破坏。根据句意可知,应用 although 引导让步状语从句。
5. (2025·江西吉安月考)The idea of "Made in China" caught the world's attention in the 2023 Asian Games
A.if
B.unless
C.although
D.because
because
it played a big role in the event.A.if
B.unless
C.although
D.because
答案：5. D 【解析】句意:“中国制造”的理念在 2023 年亚运会上引起了世界的关注,因为它在这场赛事中扮演了重要的角色。根据句意可知,空后的内容是空前内容的原因,应用 because 连接句子。
二、句型转换。
1. The old man is very weak. He can't walk for 20 miles every day.（合并为一句）
The old man is weak walk for 20 miles every day.
2. Tom's parents got up early in order to get to the airport on time.（保持句意不变）
Tom's parents got up early they could get to the airport on time.
3. The situation is so serious that we must do something to save the Earth.（保持句意不变）
The situation is for us to do something to save the Earth.
4. He was absent from school yesterday because of his illness.（改为复合句）
He was absent from school yesterday he .
1. The old man is very weak. He can't walk for 20 miles every day.（合并为一句）
The old man is weak walk for 20 miles every day.
2. Tom's parents got up early in order to get to the airport on time.（保持句意不变）
Tom's parents got up early they could get to the airport on time.
3. The situation is so serious that we must do something to save the Earth.（保持句意不变）
The situation is for us to do something to save the Earth.
4. He was absent from school yesterday because of his illness.（改为复合句）
He was absent from school yesterday he .
答案：1. too, to 2. so that 3. serious enough
4. because, was ill
4. because, was ill
三、方框选词。
after, when, that, if, it
Donna loves playing with little animals. One day, on her way to school, she saw a homeless cat sitting in a box. 1.
The longer Donna played with the cat, the more she liked 3.
after, when, that, if, it
Donna loves playing with little animals. One day, on her way to school, she saw a homeless cat sitting in a box. 1.
When
the cat saw her, it jumped out of the box. The cat was so cute 2. that
Donna couldn't help but start playing with it.The longer Donna played with the cat, the more she liked 3.
it
. Donna decided to take the cat to school with her. 4. After
Donna arrived at school, she quietly walked into the classroom. However, the cat jumped out of the schoolbag and started running. Just at that moment, the teacher stepped into the classroom. She caught the cat gently and advised Donna to take it home or to the animal centre 5. if
possible. Donna smiled sweetly and followed her teacher's words.答案：1. When 2. that 3. it 4. After 5. if