The letter "x" often represents a(n) (known) number in some Math exercises.
The 31st Olympic Games will place in Rio,Brazil.I can't wait to watch it.
This kind of sweater is too .I want to buy a cheap one.
Would you mind the window,please?It is too hot here.
The age of my friends is 14 to 16years old.
The sun rises in the and falls in the west.