A Boeing 777 took off from Malaysia’s largest city of Kuala Lumpur at 0:41 am on March 8.

1._____destination was Beijing. But the flight never arrived, 2.______ (leave) friends and relatives of the passengers onboard weeping and worrying.

  There were 239 people 3.____ board the Malaysia Airlines flight, including China, Vietnam, the US, Singapore, and the Philippines 4._______ still ______ (search) for the missing plane.

  Its 5.__________ (disappear) is an “unprecedented(史无前例的) aviation mystery”, Azharuddin Abdul Rahmanm , head of Malaysia’s Civil Aviation Authority, said on March 10.

There was no sign of 6.____ crash.

About two hours of after taking off, air traffic control suddenly lost contact with the plane. The weather was clear, the pilots didn’t make any distress calls, 7.____ no debris (碎片) was found in the area 8.______ the flight last made contact.

Besides, airplane crashes 9.________ (typical) occur during takeoff or landing. Only 9 percent of fatal accidents happen 10______ a plane is at cruising (平稳行进的)  altitude, according to a report by Boeing in August.

(原文出处:21世纪英文报)

1. Its       2. leaving     3. on      4. were…searching     

5. disappearance     6. a    7.  and      8. where     9.  typically        10. when