完形填空。Manhasdonemuchresearchinouruniverse.Manhaseveninventedfourkindsofsatellites.Thefirstkindofsatellitestudiesthegeographyof1,ourhome.Itisusedtomakemapsandalsohelpcountriesto

Question

完形填空。

        Man has done much research in our universe. Man has even invented four kinds of satellites. The first
kind of satellite studies the geography of     1     , our home. It is used to make maps and also help countries
to see where they may     2     oil and gold.
        The second kind of satellite is used to guide ships and planes. A ship or a plane can     3     a message to
the satellite, and can find out where it is.
        The third kind studies the weather. These satellites watch clouds and strong wind     4    across the earth.
They warn countries to be ready when the     5     weather is coming. They     6     of the earth from thousands
of miles above it and send the photos to weather stations on the ground. 
             7    kind is used for communication. Telephone calls     8    countries can be sent by these satellites.
Some can carry hundreds of calls at one time. A call is sent to the satellite, then the     9     sends it to a station
in the country. These satellites also carry pictures. They can    10    and send about eight pictures at a time.
People can send pictures to each other by mobile phones.

Answer 1