There are some balloons in it. There is a camera. There is a photo on the board. There are two lights in the classroom. There are some big watermelons on the desk. They’re sweet. There are two fresh apples on the desk. Look at those bananas. They look tasty. Look! There are two...
Keeping your head bent down for long is not good for your neck. Why is that? It's because you put too much pressure(压力) on your neck. It's like putting two watermelons (about 27 kilograms) on your neck. You might have neck and shoulder pain (痛) by doing that...