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April the 3rd was the day we attempted to reach Mount Everest. The morning saw us ail up and rushing about the bungalow at daybreak. We bumped down the nine miles of dusty track, each clutching a camera or one of the more delicate instruments to our chests in an endeavor to make our bodies absorb as many of the shocks from the bump track as possible. The ground staff was already busy on our arrival. The sheds where the aircraft were kept had been opened and the great machines were being manhandled out onto the tarmac. The bottles of oxygen were carefully placed in their clips and connected to the system. The vertical cameras were titled and tested, and air frames and engines were inspected and tested in every detail.
Pilots and observers fussed around their equipment, trying on many times before readjusting straps, electric leads and oxygen feed pipes that had already been adjusted to a nicety. They then rechecked the charts which had been carefully prepared to allow accurately for the increasing wind speeds during the climb—all trying to keep themselves occupied during that tense half-hour wait for the return of the reconnaissance machine.
There had been so much preparation for this flight, and there was still so much of the unknown about it, that the crews could not help being slightly affected by the general excitement. Waiting is always unpleasant, and we were all relieved to see the reconnaissance machine diving down through the dust haze. The Air Commodore who commanded it brought welcome news. Though he had been unable to climb above the dust, he had been able to see towards the mountains through the top of the haze and there was a cloudless sky. This was splendid: no cloud to mar the photography.
We had promised not to attempt the flight if the wind exceeded 40 miles an hour, but this was the first time we had found the wind under 100 miles an hour. We worked out the implications and reckoned that, provided we did not spend more than fifteen minutes at the summit, we could get back inside our petrol endurance. We might wait for days and weeks and not get another opportunity. The Air Commodore weighed the position carefully and gave the word “Go”.
1. The author and his colleagues held their instruments close to their chests because ______.
2. When the members of the expedition arrived at the aerodrome, the ground staff were ______.
3. The crews of the aircraft kept checking their equipment ______.
4. The purpose of this expedition to Mount Everest was to ______.
5. The pilots took the opportunity to ______.
6. The word “tarmac” in line 6 of paragraph 1 most probably means ______.
7. The word “They” in line 3 of paragraph 2 refers to ______.

问题1选项
A.there were so many people in the car
B.the dust might have obscured their cameras
C.the surface of the track was very uneven
D.they wanted to protect themselves from bumps
问题2选项
A.maneuvering the aircraft into position on the runway
B.attaching the clips to the bottles of oxygen
C.waiting to remove the machines from the sheds
D.making to remove the machines from the sheds
问题3选项
A.to ensure that the straps of their oxygen masks were adjustable
B.to pinpoint the position of the reconnaissance plane
C.to verify the accuracy of the wind speeds shown in their charts
D.to keep themselves busy until it was time to take off
问题4选项
A.investigate the atmospheric conditions on the mountain
B.make an aerial survey of the summit
C.test the breathing apparatus at high altitude
D.penetrate the dust haze surrounding the mountain
问题5选项
A.test the flying speed over the summit of the mountain
B.reach Mountain Everest despite the high rate of wind
C.fuss around their equipment
D.drive away unpleasant waiting
问题6选项
A.an office
B.a place
C.a paved surface for planes to take off
D.a runway
问题7选项
A.straps
B.electric leads
C.oxygen feed pipes
D.pilots and observers
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