___ from a plane, the Great Wall looks like a huge dragon.

_______ those past years, we couldn’t help feeling sorry for our parents who never had a rest all the year round.   

_____ his homework, he went out to play.

The traffic rule says young children under the age of four and           less than 40 pounds must be in a child safety seat.

--- Did you understand what the teacher said ?---Yes! She explained the text in detail to make her lessons __________.