----Did Jim come?----I don’t know. He _______ while I was out.
__________ from other continents for millions of years, Australia has many plants and animals not found in any other country in the world.
Stephen Hawking believes that the earth is unlikelyto be the only planet __________ life has developedgradually.
The newly-built cafe, the walls of __________ arepainted light green, is really a peaceful place for us, especially after hard work.
I have reached a point in my life __________ I am sup-posed to make decisions of my own.
Everyone has periods in their lives __________ everything seems very hard.