人教版（新课程标准） 选修8 Unit 5 Meeting your ancestors课时作业含解析（4份打包）.zip

Unit 5 Meeting your ancestors
课时作业20　单元加餐练
Ⅰ.单词拼写
1．We should try to keep away from radioactive (放射性的) material in our daily life.
2．For a very long time, the scientists have always been trying to find out the significance (重要性) of exploring the Mars.
3．The doctor listened to his breathing and checked his pulse (脉搏)．
4．They use special chemicals to accelerate (加速) the growth of crops.
5．Skilful (熟练的) and confident, Donaldson should become one of the game's best players.
6．Scientists have identified (确定) more than forty chemicals in tobacco smoke that cause cancer in humans and animals.
7．I have been so busy that I haven't had time to clear up the place which is so messy (凌乱的)．
8．The reporter questioned the accuracy (准确) of the information in her WeChat.
9．There is no alternative (可能的选择) for him but to maintain order under any circumstances.
10．In the botanical (植物学的) garden, many people are admiring a variety of plants.
Ⅱ.选词填空
date back to, at most, be aware of, with relief, cut...up, look ahead, get/be fed up with, regardless of
1．Most parents are_aware_of the danger of their babies' eating jelly nowadays.
2．In the end, I just got/was_fed_up_with his constant complaining.
3．The history of this country can date_back_to the Stone Age.
4．Regardless_of what it costs, we must take every measure to save the old man's life.
5．The passengers all sighed with_relie