一

With the total length of 55 kilometers,Hong Kong-Zhuhai-Macau Bridge is an unusual extraordinary achievement of engineering(不同尋常的工程壯舉) in our country.

二

①在修飾成分中，有動(dòng)詞用定語(yǔ)從句The bridge ，which connected the three cities,is the longest sea-crossing (跨海的)bridge and tunnel system in the world.

②As the longest sea-crossing (跨海的)bridge and tunnel system in the world,the bridge connected the three cities.

三

The bridge has reduced/shortened the travelling time whithin among the three cities from 3 hours to 30 minutes .

四

①With a huge span（跨度巨大的）,the bridge made of steel and concrete has sufficiently/fully proved has the ability of China to built the record-breaking(破紀(jì)錄的）megastructure/large building(巨型建筑).

②With a huge span（跨度巨大的）,the bridge made of steel and concrete has sufficiently/fully proved that China has the ability to built the record-breaking(破紀(jì)錄的）megastructure/large building(巨型建筑).

五

It will promote regional integration(區(qū)域一體化) and boost the growth of economy(經(jīng)濟(jì)增長(zhǎng)).

六

The bridge is the key for China to develope its own the overall plan of the Greater Bay Area(大灣區(qū))

七

China hopes to built the Greater Bay Area(大灣區(qū)) into an area that rivals(與……相競(jìng)爭(zhēng)/相媲美) San Francisco(舊金山),New York and Tokyo（東京） in terms of (在……上/在什么方面)technological innovation and prosperity of economy.（經(jīng)濟(jì)繁榮）