5．There are 20,000 books in our school library in the all.____________

　　[答案]　去掉the

Ⅳ.单句写作

　　1．You had better ________________ (让门敞开着), so that the fresh air can go in.

　　[答案]　leave the door open

　　2．He dropped the cup to the door, only ________________ (把它摔成了几块)．

　　[答案]　breaking it into pieces

　　3．Since then, she ______________________ (埋头工作)．

　　[答案]　has been buried in her work

　　4．At this point, ________________ (我想到) that I was wasting time.

　　[答案]　it struck me

　　5．This car was caught in a traffic jam, thus ________________ (晚点了)．

　　[答案]　being late

V．阅读理解

(2018·山东省六校高三联考)People love cellphones, which is why nine in ten Americans own one. But does heavy use of cellphones pose a risk of cancer? This question has caused controversy for many years. A new study in rats now augments those concerns. Its data linked long－term, intense exposure to radiation from cellphones with an increased risk of cancer in the heart or brain. The results have yet to be confirmed, the authors note.