题目内容：

    You can’t play, run, skate or ride a bike on the railroad ( 铁 路 ). There are many places where the railroad tracks ( 轨道) cross the roads or streets. Many of these railroad crossings are marked with the signs in the table below.

	This sign means you are coming to a railroad crossing. Always look both sides and listen carefully to be sure a train is not coming from either direction before you go across the tracks.
	Many railroad crossings have a gate with flashing lights. The gate will close whena train is coming ●   NEVER play around a closed railroad gate. ●   NEVER try to get across the tracks before the train gets there.
	Some railroad crossings which don’t have gates may have this sign. When the lights are flashing, a train is coming. You should wait until the train passes instead of trying to cross the tracks.

 

 

Be careful when crossing road tracks:

* Railroad tracks are uneven (凹凸不平的). You should not bicycle, skate or run when crossing the tracks.

* Trains are very large and heavy, so they need take a long time to stop.

* Sometimes when a train has just passed from one direction, another train may come from the opposite direction. You may not notice the second train because of the noise of the first train.

1.When you see the first sign, you should___________.

A.not pass the railroad tracks B.stop to wait for a train to pass

C.pass the railroad tracks at once D.make sure no train is coming before you cross the tracks

2.Where can you see the third sign?

A.At the train stations. B.On the railroad tracks.

C.At railroad crossings that have gates. D.At railroad crossings that have no gates.

3.What can you learn from the passage?

A.There are many gates at the railroad crossings. B.We can see many railroad signs in our cities.

C.It’s dangerous to play, run or ride a bicycle on the railroad. D.It takes a short time for a train to stop.