12.The red river is shorter than the Mekong river.
13.How wide is the Great Wall?
14.Phuong is Nam's sister.
15.My father usually goes to work by motorbike.
16.My class has forty students.
17.The house is behind the flower garden.
Chọn đáp án thích hợp.
1.C
2.A
3.B
4.C
5.B
6.C
7.B
8.A
9.C
10.C
11.B
12.B
13.B
14.C
15.B
16.A
17.B
18.A
19.B
20.C
21.B