All we have is 24 precious hours a day and therefore we shall waste ______

We should plant more trees on  ____ sides of the street.

.She has three brothers.___ is a doctor, ___ are PLA men.

--Can you let these new graduates take on the task?---I’m afraid not. While they are energetic and ambitious, ____of them seems to be suitable for this demanding job.

Being a parent is not always easy and being the parent of a child with special needs often carries with _____extra stress.