Paper making in China ______ from there to North Africa and Europe.
A. sprang
B. spilled
C. carried
D. spread
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If your car ______. any attention during the first 6 months, take it to an authorized dealer.
A. will need
B. should need
C. would need
D. shall need
______you were busy, I wouldn't have bothered you with my questions.
A. If I realized
B. Had I realized
C. I realized that
D. As I realized
______, I was very sad and didn't know how to spend the rest of the month.
A. Picking my pocket
B. With my pocket picked
C. Picked my pocket
D. With my pocket picking
That there is no sharp dividing line between insulators and conductors is ______ we have learned in this lesson.
A. that
B. which
C. what
D. it