1.______ the average age of the population increases，there are more and more old people to care for.
2.When you have bought a fish and arrive home, you’d better store the fish in the refrigerator ________you don’t cook it immediately.
3.My grandfather still plays tennis now and then，________he’s in his nineties.
4.I really enjoy listening to music ________it helps me relax and takes my mind away from other cares of the day.
5.________ you do, don’t be a bystander.
6.________the little panda cried, the mother rocked it back and forth and gave it little comforting pats.
7.________some people are motivated by a need for success, others are motivated by a fear of failure.
8.________online shopping has changed our life, not all of its effects have been positive.
9.It is so cold that you can't go outside ________ fully covered in thick clothes.
10.________ the job takes a significant amount of time, most students agree that the experience is worth it.
11.You won't find paper cutting difficult ________ long as you keep practicing it.
12.________ the damage is done, it will take many years for the farmland to recover.
13.Just ________ a single word can change the meaning of a sentence, a single sentence can change the meaning of a paragraph.
14.If you miss this chance, it may be years ________ you get another one.
15.We need to get to the root of the problem________ we can solve it.
16.________scientists have learned a lot about the universe, there is much we still don't know.
17.________ the students came from different countries, they got along quite well in the summer camp.
18.The meaning of the word“nice”changed a few times ________ it finally came to include the sense“pleasant”．
19.It was the middle of the night ______ my father woke me up and told me to watch the football game.
20.The young couple，who returned my lost wallet，left ________ I could ask for their names.
21.Half an hour later，Lucy still couldn't get a taxi ______ the bus had dropped her.
22.Even ________ the forest park is far away，a lot of tourists visit it every year.
23.Lessons can be learned to face the future，________ history cannot be changed.
24.I don't really like the author，________ I have to admit his books are very exciting.
25.You will never gain success ________ you are fully devoted to your work.
26．________ you start eating in a healthier way，weight control will become much easier.
参考答案
2.When you have bought a fish and arrive home, you’d better store the fish in the refrigerator ________you don’t cook it immediately.
3.My grandfather still plays tennis now and then，________he’s in his nineties.
4.I really enjoy listening to music ________it helps me relax and takes my mind away from other cares of the day.
5.________ you do, don’t be a bystander.
6.________the little panda cried, the mother rocked it back and forth and gave it little comforting pats.
7.________some people are motivated by a need for success, others are motivated by a fear of failure.
8.________online shopping has changed our life, not all of its effects have been positive.
9.It is so cold that you can't go outside ________ fully covered in thick clothes.
10.________ the job takes a significant amount of time, most students agree that the experience is worth it.
11.You won't find paper cutting difficult ________ long as you keep practicing it.
12.________ the damage is done, it will take many years for the farmland to recover.
13.Just ________ a single word can change the meaning of a sentence, a single sentence can change the meaning of a paragraph.
14.If you miss this chance, it may be years ________ you get another one.
15.We need to get to the root of the problem________ we can solve it.
16.________scientists have learned a lot about the universe, there is much we still don't know.
17.________ the students came from different countries, they got along quite well in the summer camp.
18.The meaning of the word“nice”changed a few times ________ it finally came to include the sense“pleasant”．
19.It was the middle of the night ______ my father woke me up and told me to watch the football game.
20.The young couple，who returned my lost wallet，left ________ I could ask for their names.
21.Half an hour later，Lucy still couldn't get a taxi ______ the bus had dropped her.
22.Even ________ the forest park is far away，a lot of tourists visit it every year.
23.Lessons can be learned to face the future，________ history cannot be changed.
24.I don't really like the author，________ I have to admit his books are very exciting.
25.You will never gain success ________ you are fully devoted to your work.
26．________ you start eating in a healthier way，weight control will become much easier.
参考答案
