—Have you ever been to Australia?—No. I’d like to,       .

 It seems that living green is ________ easy and affordable. A small step makes a big difference.

Drunk driving used to occur _____, but now it is under control．

When we got there, he was about to leave. So he only had time to explain _______ to us how he ________ our plan.

(2013·大连24中模拟)Good health is the basis for students to ________ carry on with their studies and to do any other activity.