History of India - Test - 08

Who among the following, proved the spherical shape of the earth during his first voyage around the world?

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The serial number of the first MAC ever produced was 2001      .. More >>

air alert:
1.the time period during which military and civilian agencies are prepared for an enemy air attack
2.the condition in which combat aircraft are airborne and ready for an operation
3.the warning signal that begins an period of preparation for an enemy air attack      .. More >>

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  • At is used to talk about position at a point.
      It's very hot at the centre of the earth.
      Turn right at the next traffic-lights.
    Sometimes we use at with a larger place, if we just think of it as a point: a point on a journey, a meeting place, or the place where something happens.
      You have to change trains at Didcot.
      The plane stops for an hour at Frankfurt.
      Let's meet at the station.
      There's a good film at the cinema in Market Street.
  • On is used to talk about position on a line. ON
      His house is on the way from Aberdeen to Dundee.
      Stratford is on the River Avon.
    On is also used for position on a surface.
      Come on supper's on the table!
      Id prefer that picture on the other wall.
      There's a big spider on the ceiling.
  • In is used for position in a three-dimensional space (when something is surrounded on all sides).
      I don't think he's in his office.
      Let's go for a walk in the woods.
      I last saw her in the car park.
  • We say on (and off) for buses, planes and trains.
      He's arriving on the 3.15 train.
      There's no room on the bus; let's get off again.
  • In addresses, we use at if we give the house number.
      She lives at 73 Albert Street.
    We use in if we just give the name of the street.
      She lives in Albert Street.
    We use on for the number of the floor.
      She lives in a flat on the third floor.
  • Learn these expressions:
      in a picture in the sky on a page
      in bed/hospital/prison/church
      at home/school/work/university/college.
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