题目内容：

阅读下面短文，掌握其大意，然后从1－20各题所给的四个选项（A、B、C和D）中选出最佳选项。

Harriet Tubman was born a slave.She didn't get a ____ to go to school.____ a child，Harriet had to work very hard in ____ all day.That way，her owner could _  __ a lot of money when he sold his crops.Harriet ____ think that she was being treated fairly.

____ Harriet grew up，she ran away from the plantation(庄园) to the northern United States.There，and in Canada，____ could be free.

Harriet liked to be free.She felt ____for all of the black people who were ____ slaves.

Harriet returned to ____ to help other slaves to run away.She made ____ that they got to the North and became free.

Harriet was in great ____ because of a ____ law.The law said it was not permitted to ____ slaves run away.She also ____ that the slave owners said they would ____ $4,000 to anyone who could catch Harriet Tubman.

There were many stories about Harriet helping slaves run away.In all，she made nineteen ____ back to the South and guided about 300 slaves to ____.When the Civil War broke out，the northern states ____ with the southern states.Harriet ____ the northern states because the northerners believed that slaves should be free.She worked as a nurse and spied behind enemy lines until the northern states won the war.

1.A．day        B．chance     C．permission    D．moment

2.A．As          B．Being    C．Since         D．Like

3.A．the farm    B．a school   C．the fields    D．a factory

4.A．make        B．pay         C．got           D．spend

5.A．certainly   B．didn't     C．did          D．no longer

6.A．Since       B．After       C．Then         D．With

7.A．the white   B．white       C．black         D．black people

8.A．happy      B．sure        C．wrong         D．sorry

9.A．still      B．yet         C．only          D．not

10.A．Canada    B．the South   C．the North    D．the U．S.

11.A．perfect    B．way        C．possible      D．sure

12.A．anger    B．anxiety     C．hurry        D．danger

13.A．explained  B．gained     C．passed        D．broken

14.A．help       B．set free   C．stop          D．catch

15.A．found     B．noticed     C．found out    D．made sure

16.A．pay        B．make        C．spend        D．get

17.A．letters  B．incidents   C．trips         D．trials

18.A．freedom    B．safety      C．North         D．southern states

19.A．united     B．fought      C．made peace   D．gave in

20.A．looked for B．stood for   C．looked on    D．went to