Unit 2 Poems using language课时作业

Ⅰ.语法填空

　　1．(2018·全国卷Ⅱ)What the plants pump through the air is a __________ (mix) of chemicals known as volatile organic compounds, VOCs for short.

　　[答案]　mixture

　　2．(2018·全国卷Ⅲ)But we all have to accept that as we get older our __________ (react) slow down and this often results in people avoiding any potentially challenging driving conditions and losing confidence in their driving skills.

　　[答案]　reactions

　　3．(2018·长沙质检)It is no use __________ (do) things without aim.

　　[答案]　doing

　　4．(2018·广东模拟考)You are supposed __________ (arrive) on time, or we'll not finish the task on schedule.

　　[答案]　to arrive

　　5．He was __________ (astonish) that his answer should have caused such a strong __________ (react)．

　　[答案]　astonished；reaction

　　6．They came to a __________ (conclude) that nothing is more precious than peace in the world.

　　[答案]　conclusion

　　7．The rise of the charge of water and __________ (electrical) will affect living expenses.

　　[答案]　electricity

8．The young man went to Shenzhen, __________ (aim) at finding a