He’s trained hard for the last two years. It is ______ he did so well at the track and field meet yesterday.

What is the ______ to Beijing and back?

Shelly had prepared carefully for her English examination so that she could be sure of passing it on her first ________. 

At the __________ of the gun,the runners dashed from their starting points.

 — Do you have any plans for this holiday?— To tell you the truth, I have nothing in        for holiday.