—Did you find out the time of the train to Miami? —Yes, the early train is _______ to leave at 5:30 a.m.

Wouldn’t it be______for you to pick me up at four o’clock and take me to the airport.

You should practice reading as much as you can, since it is a(n) ______ skill, and it must be taken seriously. 

The old .engineer’s eyes still shone bright in the wrinkled brown face and his step as he came across the room was________，though slow.

However，at　times　this　balance　in　nature　is＿＿，resulting　in　anumber　of　possibly　unforeseen　effects．