3．Since the disappearance of Malaysian flight MH370 early Saturday，revelations about the passenger list and plane's flight plan have left officials（38）Dto get latest information．
As officials and authorities attempt to（39）Cwhat happened，they are still faced with the lack of physical evidence including the missing flight data recorder and the black box．
Stolen Passports
Perhaps the most troubling mystery surrounding the missing plane is（40）Atwo passengers who were travelling on stolen passports played any role in what happened to the jet．
Both an Austrian and Italian passenger were（41）Aon the flight manifest（名單），but neither was actually on the plane．Both had their passports stolen in Thailand．
Plane's Disappearance is shocking
Without more information or the missing plane's black boxes，authorities could not confirm or rule out terrorism．（42）Bthere is an Interpol database of stolen passports，officials told The Associated Press that no one had checked the database before the flight took off．
Disappeared Midflight
The most dangerous parts of a flight are（43）Bthe takeoff and landing，but the missing jetliner disappeared about two hours into a six-hour flight，when it should have been cruising （巡航）safely around 35，000 feet．
No SOS Signal
Another（44）Celement in the missing plane case is that the pilots never sent an SOS signal before disappearing from radar．
If pilots did not even have time to alert air traffic control，experts say that is a likely sign that the event would have been quick and（45）D．The Boeing 777 can fly on just one engine and even if both engines go out，they can be restarted．
Did it Turn Around？
The whole world is wondering：Did the plane turn around？
At a （46）Aconference today，a Malaysian official said that the plane may have turned around．"The military radar indicated that the aircraft may have made a turn back．But from what we have now，there was no such signal or （47）Bcall，so we are equally puzzled．"
| 38．A．wondering | B．combining | C．participating | D．scrambling |
| 39．A．pick out | B．take out | C．figure out | D．turn out |
| 40．A．whether | B．how | C．why | D．when |
| 41．A．listed | B．enrolled | C．focused | D．commented |
| 42．A．Because | B．Although | C．When | D．Unless |
| 43．A．occasionally | B．traditionally | C．rarely | D．consequently |
| 44．A．delighting | B．missing | C．alarming | D．interesting |
| 45．A．previous | B．precious | C．various | D．disastrous |
| 46．A．press | B．pressure | C．stress | D．reporter |
| 47．A．quick | B．urgent | C．frequent | D．relevant |
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