In our school students are ________according to how much they know and how old they are

Both David and his sister left school when they were only 11.— No wonder of them is poor –educated.

17 They don’t think advertisements are useful for our daily life,

________ does your mother go to work— She usually goes to work in a car.

The two birds _________ each other in shape and color. In other words, they ________ each other in shape and color.