Cho tứ giác ABCD, biết :

a)     Tính các góc của tứ giác ABCD

b)    Tứ giác ABCD có phải  hình thang không? Vì sao?

I.    Supply the correct word form

1.      I am ____________________ to have a friend like you. ( luck )

2.      He does things  ____________________ from his classmates. ( differ )

3.      Bao and Khai take part in ____________________ activities after school hours. ( differ )

4.      She felt  ____________________  upset about losing her job. ( extreme )

5.      Miss Hanh works in the library. She is a  ____________________ ( library )

6.      Hoa seems  ____________________  when she tells me about her family. ( happily )

7.      ____________________ , she has just passed her exam. ( Luck )

8.      She is a  ____________________ singer and she sings  ____________________  ( beautify )

9.      What a  ____________________ cat ! ( love )

10.  My parents enjoys the  ____________________of the countryside. ( peaceful )

11.  Everybody works  ____________________  in the local library. ( quiet )

12.  Song is a school’s star soccer ____________________ ( play )

13.  I like Lan very much because she’s always  ____________________ ( sociability )

14.  My uncle is  ____________________ he willingly lends someone money. ( generosity )

15.  She was my next-door ____________________in Hue. (neighborhood)

16.  Bao is the most __________________student in my class. (society)

17.  His parents died in a car accident when he was four. He is an__________________. (orphanage)

18.  Lan and Trang are quite ____________________in public. (reserve)