a
b
c
d
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
bạn chia nhỏ đề ra đi ạ chứ bây giờ nhập đáp án xong kéo lên mệt lắm ạ
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
II. Mark the letter A, B, C or D to indicate the underlined part that needs correction in each of the following questions.
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
10.
1 điểm
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
*
A
B
C
D
abcd abcd :abcd =abcd
abcdabcd:abcd=abcd
=>10001=abcd(vô lí)
vậy abcd=rỗng
Tìm số abcd biết abcd+ abcd+ abcd+abcd=2231,999.
Giúp mình nhé!
Exercise 1: Choose the word having the underlined part pronounced differently in each line.
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
*
A
B
C
D
*
A
B
C
D