Because helicopterscan go almost anywhere,they have been especially useful to explorers.In the jungles of South America they have helped explorers looking for new places to sink oil wells.First of all the helicopters lift the geologists and mineralogists into the heart of jungle,trying first one area and then another,and when they find a place that seems likely to yield oil ,the helicopters can bring in drilling equipment.They can bring in huts in pieces,and very nearly everything that may be needed.If a telephone is needed from the jungle outpost back to the mian base,then the wires themselves can be laid across the jungle treetops.All the helicopter has to do is to fly close over the trees unreeling the cable from a big drum as it goes.
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1 The helicopter now can help us do many things;which of the following is not mentioned by the author?
A It can help people build new bridges.
B It can save people from mountaintops.
C It can lower a new cross onto the spire of a church.