Millie is writing about some modern inventions that have changed the way we live. Help her choose the correct words in brackets to complete her article.
Many modern inventions (1) ______ (made/have made) a great difference in our life. They (2) ______ (changed/have changed) the way we live.
In ancient times, people (3) ______ (used/have used) salt to help them keep fish or meat for a longer time. Fresh food would go bad in summer in a few hours. The invention of the fridge (4) ______ (solved/has solved) this problem.
In the past, people (5) ______ (washed/have washed) their clothes by hand. It (6) ______ (was/has been) tiring, and it (7) ______ (took/has taken) a lot of time. With the invention of the washing machine, people (8) ______ (had/have had) more time to relax.
In the old days, people (9) ______ (travelled/have travelled) by ship. Now planes (10) ______ (made/have made) journeys more comfortable.
Many modern inventions (1) ______ (made/have made) a great difference in our life. They (2) ______ (changed/have changed) the way we live.
In ancient times, people (3) ______ (used/have used) salt to help them keep fish or meat for a longer time. Fresh food would go bad in summer in a few hours. The invention of the fridge (4) ______ (solved/has solved) this problem.
In the past, people (5) ______ (washed/have washed) their clothes by hand. It (6) ______ (was/has been) tiring, and it (7) ______ (took/has taken) a lot of time. With the invention of the washing machine, people (8) ______ (had/have had) more time to relax.
In the old days, people (9) ______ (travelled/have travelled) by ship. Now planes (10) ______ (made/have made) journeys more comfortable.
答案：1. have made
解析：“现代发明对生活产生影响”是过去发生的动作持续到现在，用现在完成时，结构为“have/has+过去分词”，主语inventions是复数，用have，make的过去分词为made。
2. have changed
解析：“改变生活方式”同样是过去动作对现在的影响，用现在完成时，主语They，用have，change的过去分词为changed。
3. used
解析：“古代人们用盐”是过去发生的动作，用一般过去时，use的过去式为used。
4. has solved
解析：“冰箱的发明解决问题”强调对现在的影响，用现在完成时，主语invention是单数，用has，solve的过去分词为solved。
5. washed
解析：“过去人们手洗衣服”是过去的动作，用一般过去时，wash的过去式为washed。
6. was
解析：描述过去的状态，用一般过去时，主语It，be动词用was。
7. took
解析：“花费时间”是过去的动作，用一般过去时，take的过去式为took。
8. have had
解析：“有更多时间放松”是洗衣机发明后持续到现在的影响，用现在完成时，主语people，用have，have的过去分词为had。
9. travelled
解析：“过去人们乘船旅行”是过去的动作，用一般过去时，travel的过去式为travelled。
10. have made
解析：“飞机使旅行更舒适”是过去动作对现在的影响，用现在完成时，主语planes是复数，用have，make的过去分词为made。
解析：“现代发明对生活产生影响”是过去发生的动作持续到现在，用现在完成时，结构为“have/has+过去分词”，主语inventions是复数，用have，make的过去分词为made。
2. have changed
解析：“改变生活方式”同样是过去动作对现在的影响，用现在完成时，主语They，用have，change的过去分词为changed。
3. used
解析：“古代人们用盐”是过去发生的动作，用一般过去时，use的过去式为used。
4. has solved
解析：“冰箱的发明解决问题”强调对现在的影响，用现在完成时，主语invention是单数，用has，solve的过去分词为solved。
5. washed
解析：“过去人们手洗衣服”是过去的动作，用一般过去时，wash的过去式为washed。
6. was
解析：描述过去的状态，用一般过去时，主语It，be动词用was。
7. took
解析：“花费时间”是过去的动作，用一般过去时，take的过去式为took。
8. have had
解析：“有更多时间放松”是洗衣机发明后持续到现在的影响，用现在完成时，主语people，用have，have的过去分词为had。
9. travelled
解析：“过去人们乘船旅行”是过去的动作，用一般过去时，travel的过去式为travelled。
10. have made
解析：“飞机使旅行更舒适”是过去动作对现在的影响，用现在完成时，主语planes是复数，用have，make的过去分词为made。