1．A man’s shopping can be and often is completed in five minutes，which is only less than a quarter＿．
A. of a woman’s B. that of a woman’s
C. of that of a woman D. of a woman
2．Suppose you tried to lift a 100-pound rock two feet，you ____more work than if you it one feet.
A. would do. ..lifted B. did… lifted C. will do... will lift D. would do ... will lift
3．The fire brigade arrived two hours later after the alarm was sounded，＿it was too late to save much of the building.
A. then B. when
C. which D. though
4．The firm should make a substantial profit＿satisfactory labor relations are maintained.
A. in case B. with the purpose that
C. provided that D. even if
5. When the man came in，carrying the machine gun，most of us looked up in surprise，because we＿anything like it before.
A. have never seen B. never saw
C. didn't see D. had never seen