Don’t _________ the bus until it has stopped. Safety is first.
We should do some things to protect the environment.For example,we shouldn’t________too many trees.
—Remember this,children.________careful you are,________mistakes you will make.—We know.Mr.Li.
—Which is________,the sun,the moon or the earth?—Of course the sun.A.smallerB.the smallestC.the biggest
—What’s the________of these vegetables?—It’s about 3 kilos.
The apples on this tree are bigger than________on that tree.