V. Read the passage and choose the best answer to fill in each blank. Tel Aviv will be the first city in the world to have a skyTran system. This system will help the city (21) ________ traffic congestion. Moreover, skyTran will provide a greener, less expensive, faster, and more comfortable mode of travel (22) ________ cars and buses. The system has many pods and each pod has two seats. Passengers can get a pod by using a smartphone (23) ________. The pods glide along the rails above to their destination. The pods run on electricity and can travel at speeds up to 150 mph (24) ________ passengers will still have a smooth ride. The system is about 70 m above the ground. The cost is higher than taking a bus but lower than taking a taxi. So, many people think it (25) ________ a perfect means of transport to replace traditional ones. The USA and many Asian countries are interested in building skyTran networks in the very near future. 21. A. increase B. reduce C. maintain D. balance 22. A. than B. as C. that D. with 23. A. tool B. device C. app D. website 24. A. if B. when C. whether D. while 25. A. is B. will be C. has been D. was