选词填空。用方框中所给词的适当形式填空，使文章通顺、连贯、合理。（每空一词，每词限用一次）unfortunate direct distant see cloud |
It's easy to find your way over short distances. You can ask a friend or read a map. But what about over long {#blank#}1{#/blank#}? How do people find their way?
Looking at the sun and stars is a good way to find a {#blank#}2{#/blank#}. This method works when the sky is clear, but when it's {#blank#}3{#/blank#}, the sun and the stars can't be {#blank#}4{#/blank#}. What can people do then?
When the sky is not clear, a compass can be used. A compass shows north, south, east and west. It can be used in any weather. {#blank#}5{#/blank#}, using a compass is not so easy.
