用适当的连接词填空
1．A ship in harbor is safe, but that's not ________ ships are built for.
2．—I wonder ________ Mary has kept her figure after all these years.
—By working out every day.
3．The exhibition tells us ________ we should do something to stop air pollution.
4．We must find out ________ Karl is coming, so we can book a room for him.
5．If you swim in a river or lake, be sure to investigate ________ is below the water surface. Often there are rocks or branches hidden in the water.
6．You have to know ________ you're going if you are to plan the best way of getting there.
7．I truly believe ________ beauty comes from within.
8．Reading her biography, I was lost in admiration for ________ Doris Lessing had achieved in literature.
9．It is difficult for us to imagine ________ life was like for slaves in the ancient world.
10．I want to know ________ you can repair the computer or not.
