题目内容
You can’t catch up with others ______ you work very hard.
A. until B. after C. unless D. when
C
【解析】
试题分析：句意:除非你努力学习，否则你就追不上别人。until 直到…时候；after 在…之后；unless 除非；when 当…时候。根据句意可知选C。
考点：考查连词。
词语运用（10个小题，每个小题1分，共10分）
阅读短文，用方框内所给单词的正确形式填空，使短文意思通顺、完整。请将答案写在短文后相应题号的横线上。注意：①每个词只能用一次。②每空限填一词，有些词需要做相应的变化。③其中有两个多余选项。
tell still because hot last example in ton black before deep on |
Elephants are the largest living animals__1.__ land. More than 500 different kinds of elephants have been found on earth during the _2._ 55 million years. Only two kinds are __3.___ alive today. The African Elephant and the Asian ( or Indian ) Elephant. These elephants can only be found in __4.___ places. The older kinds, which lived a long time ago, lived in colder places. An ___5.__ is the mammoths----the largest hairy elephants. Mammoths were about the size of the largest living elephant, which is about seven __6.___. Unlike the elephants today, mammoths had ___7.__ or dark brown hair covering their bodies. All the mammoths had tusks(象牙), and we can __8.___ this from their fossil teeth.
Scientists found out about most of the extinct（绝迹） animals by studying the fossils, such as their bones and teeth that have been found. However, mammoths are quite different.
During the Ice Age, mammoths died and were covered ___9.__ in the ice. The ice kept them well. While many animals only left behind bones and teeth, scientists found the whole body of the mammoth. __10.___ the whole mammoth has been kept well, scientists can see even the hair, the tusks and the whole body.