A passenger plane carrying 163 people was forced to turn back 40 minutes into the flight after it was discovered one of the plane's doors was not completely shut.

The flight, operated by low-cost Korean Air subsidiary（子公司） Jin Air, left Cebu in the Philippines（菲律宾）on Sunday, bound for Busan in South Korea.

A public relations officer with Jin Air confirmed the incident to CNN, saying a noise alerted staff to a gap in the door, prompting the pilot to return to Cebu.

At the time of the incident the Boeing 737-800 was at an altitude（高度）of 10,000 feet.

According to the Jin Air officer, an inflight announcement was made to inform those on board the flight.

Though the officer said no injuries were reported, local South Korea media reports said some passengers complained about feeling nauseous during the return flight.

Jin Air says passengers were provided rooms in a local hotel and the flight took off again for Busan 15 hours later.

“Each passenger will be given a compensation of 100,000 won ($84.28),” said the Jin Air spokesperson.

An official from the South Korean Transport Ministry told CNN they are now investigating the exact cause of the incident and plan to carry out safety inspections on six low-cost airlines this month: Jin Air, Air Busan, Jeju Air, Easter Jet, T'way Air and Air Incheon.

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1.Where is the flight bound for?

A Cebu.

B Philippines.

C Busan.

D Jin Air.

解析：选C。细节理解题。根据第二段，可知飞机是准备飞往韩国釜山的。故选C。

2.According to the passage, which statement is Not true?

A The flight was forced to turn back due to a problem with a gap in the door.

B The CNN first discovered the accident on the flight and reported it tot the Jin Air.

C The flight had flied for 40 minutes before it was forced to turn back.

D There was no serious accident even though some problems happened.

解析：选B。细节理解题。根据第三段可知缝隙的是机上员工，CNN只是其中的一个报道事故的媒体。故选B。

3.From the passage, it can be inferred that__________.

A Low-cost airlines pay little attention to the flight security.

B Some passengers felt nauseous due to the gap in the door.

C South Korean Transport Ministry after the investigation will punish the Jin Air for the accident.

D For the safety of low-cost airlines before the accident, no more attention may not have been paid.

解析：选D。细节理解题。A、B太过绝对，全文也没明确有这方面的交待。尤其B只是说有可能。C 也只能说有可能。答案过于绝对。故选D。

4.What is the best title for the passage?

A Open door forces passenger plane to turn back.

B Low-cost airline safety.

C A surprising gap in the door.

D Safety inspection for the low-cost airlines.

解析：选A。文章标题题。只有A答案说出了文章的核心意思。B有点宽泛，C只讲出来一点，又过于狭窄。D只能说是由事故引发的后果措施，不足以概括大意。故选A。