Find a mistake in the four underlined parts of the sentence and correct it:
I didn’t see Mary since she went to live in the capital. 
                                    
A. didn’t see
B. went
C. to live
D. the capital

Find a mistake in the four underlined parts of the sentence and correct it:
 Just as I had got to an interesting part of the story, the doorbell rang.
A. Just
B. had got
C. interesting
D. rang

Find a mistake in the four underlined parts of the sentence and correct it:
He is the only member of the gang who’s identity has remained a secret.
A. the only
B. of
C. who's
D. has remained

Find a mistake in the four underlined parts of the sentence and correct it:
There is nothing more annoying than people interrupt when you are speaking.
A. There is
B. more annoying
C. people interrupt
D. are speaking

Find a mistake in the four underlined parts of the sentence and correct it:
In this summer, I went to Finland with my girlfriend.
A. In this summer
B. went to
C. with
D. girlfriend

Find a mistake in the four underlined parts of the sentence and correct it:
Education and training are an important steps in getting the kind of job that you would like to have.
A. Education
B. an
C. in getting
D. that

Find a mistake in the four underlined parts of the sentence and correct it:
The apartment owner spoke of several tenants about a possible rent increase.
A. apartment owner
B. of
C. about
D. rent increase

Ảnh của M ( 2,-3) qua phép quay tâm O(0,0) góc quay - 900 là
A. A( 3, 2)            
B. B( 2, 3)            
C. C(-2, -3) 
D. D( -3, -2)

Trong hệ trục tọa độ Oxy , xác định tọa độ các đỉnh C, D của hình bình hành ABCD biết đỉnh A(-2; 0) đỉnh B(-1; 0). Biết giao điểm I của 2 đường chéo có tọa độ (1; 2):
A. C(4; 4); D(3; 4)
B. C(3; -2); D(2; -2)
C. C(4; 2); D(-3; 3)
D. C(4; 3); D(3; -3)

Trong mặt phẳng Oxy, cho đường tròn (C) (x-2)2+(y-2)2=4 . Phép đồng dạng có được bằng cách thực hiện liên tiếp phép vị tự tâm O, tỉ số k=12 và phép quay tâm O góc 90o biến (C) thành đường tròn:
A. (x+2)2+(y-1)2=1
B. (x-1)2+(y-1)2=1
C. (x-2)2+(y-2)2=1
D. (x+1)2+(y-1)2=1