Bamboo, which is a common plant in the south, is used ______ in buildings, food, furniture and so on. It is used to make clothes as well.
Now plastic has been widely used ___ wood and metal.
“Must I do the work right now, Mom?” “No, you ___. You may do it tomorrow.”
An ant has two ___.
Tom’s mother said; “Nobody can prevent him ___ smoking.”
He is said to be ___ the office.