20. You will be late for school...you get up earlier.
When they learned to make cloth to cover their bodies, they ...(47)...to find ways and means
of colouring it brightly. In time, they discovered the method of dyeing their clothes.
A. if B. unless C. if not D. because
People knew how to dye their clothes even before they knew ...(48)...to read or write.
II. VOCABULARY AND _EXPRESSION
During that times, men ...(49)...how to make dye, so they got their colours from what they...
A.
(50)...around them.
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