1. (2024临夏) 自从我上次遇到我的小学同学，已经有三年了。
It ____________________ three years since I last met my primary school classmates.
2. (2023通辽) 怀特一家来中国已经两年了。
It has ________________ two years ____________________ the Whites came to China.
3. (2023无锡) 没有人确切地知道这对老夫妇(couple)结婚多久了，但他们似乎一直相爱。
Nobody knows ______________________________ , but they always seem to love each other very much.
4. (2021鞍山) 他已经入党20年了。
He ______________________________ the Party for 20 years.

三、1. has been/is 2. been; since 3. exactly how long the old couple have/has been married 4. has been a member of/has been in

Xi’an is the capital city of Shaanxi Province. It lies in 1.____________ north-west of China. The city’s early history is often connected (连接) with Liu Bang, who started the Han dynasty and made Xi’an his capital. He 2.____________ (give) it the name Chang’an. During the Tang dynasty, Xi’an achieved (达到) its great importance. Korea and Japan followed Xi’an’s example in 3.____________ (build) their ancient (古代的) capitals.
Many things from ancient times can still be found in Xi’an today. The city wall — one of the few city walls still left in China — is a good example. It 4.____________ (go) around the city and is an important cultural site (遗址). In central Xi’an there is the Bell Tower — the 5.____________ (large) bell tower remaining (保留) in China. The bell was first designed as an emergency alarm (警钟) to warn people of danger. 6.____________ , it was later used to tell people the time.
While Xi’an is a city 7.____________ a long history, it is also very much a part of the modern world. It is best known as a centre for software (软件) research, development and services. So far, Xi’an 8.____________ (be) a city of art, industry and business that have placed it far in front of many other 9.____________ (city).
Xi’an is a city always renewing 10.____________ (it) and looking forward, all the while keeping the best of the past.

四、1. the 2. gave 3. building 4. goes 5. largest 6. However 7. with 8. has been 9. cities 10. itself