Units 15~16 The necklaceScientists at work Ⅰ
单项填空1.I can never forget one afternoon ten years ago________you came to my house and helped me out of trouble
A.while B.when C.that D.where 答案:B2.More natural resources should be________use of to meet the increasing need of energy
A.put B.brought C.taken D.made解析:此是 make use of 短语的被动语态形式
答案:D3 . I told you that you shouldn’t waste your time playing football all day long ,________
A.didn’t I B.did I C.should you D.shouldn’t you解析:反意疑问句通常要与主句的主语和谓语一致
此句意为“我没告诉过你吗
”答案:A4.This material________,so be careful when you wear it
A.is torn easily B.is torn easy C.tears easily D.tears easy解析:tear“破裂,撕破”,可用作不及物动词,后跟一副词,表示某东西的特性
答案:C5.________existed a certain doubt among the workers as to the necessity of the work
A.It B.There C.What D.That解析:表示“对……有疑虑”要用