It seems that living green is ________easy and affordable. A small step makes a big difference.
The student _____ from the training so much that he was _____ the first prize in the event.
You ______ be hungry already--- you had lunch only two hours ago!
I like getting up very early in summer. The morning air is good _______.
--- You’re quite free now, I think. ---_______. I have tons of things to do!
--- May I open the window to let in some fresh air? ---- ______.