Question

    Do you know that you can use your watch as a compass (指南针)on a sunny day?Take a watch and point the hour-hand in the direction of the sun .Imagine (想象)a line which runs from the center of the watch through a point half-way between the hour-hand and number one. This line will surely point south.
    If you know astronomy a little, you will understand why this works. Inthe northern half of the earth, the sun is in the south at noon. In Russia, the real noon is one o'clock. If at that time we piont  the hour-hand at the sun, the hour-hand and the number one will point south. That is why you must imagine a line which will run from the center .If the watch through a point half -way between the hour-hand and number one. It will point south. If you are in the southern part of our planet, you must point number 12 at the sun. The line which you can imagine between number twelve and the hour-hand will then show north.
1．When we carry out this experiment in the northern part of the earth ,we should point ______at the sun.
A．number 12   B．the minute-hand   C．the hour-hand  D．number one
2．What does the underlined word "astronomy" mean in the passage?
A．天文学  B．地理学  C．宇航学  D．逻辑学
3．The passage tells us that we can use a watch ____on a sunny day.
A．to study the weather     B． to show direction   
C．to enjoy ourselves       D． to keep good time
4．If you are in Australia ,which of the following is the right way to show north?
 5．What's the best title for this passage?
A． Your Watch Becomes a Compass  B． An Interesting Watch
C． The Story  of a Watch          D． The Sun and a Watch

Answer 1

1C  2A  3B  4D  5A