All the children should be helped when they are ______. They should also be treated with ______.
_______ the help of my teacher, I worked out the problem in the end.
The little boy often makes his mother _____him _____.
——would you like somewhere__________? ——No, thanks. I have a big room ________.
What action should they _____________such a thing happen again?
You must stop and wait for your turn when you see the sign______. A.B.C.