In the fourteenth century, ______ that glass coated with silver nitrate would turn yellow when fired in an oven.

A. Take plenty of spare parts so your car will not brake down in rough mountain road

B.  In case your case break down in the rough mountain road, take much spare parts.

C. In case your case break down in the rough mountain road, spare parts are plentiful

D. In case your car breaks down in the rough mountain road, take plenty of spare parts.

A. the air 

B. breath 

C. taste 

D. or color

A. should be planted 

B. to plant

C. must planting   

D. should plant

A. than do any other         

B. does than any other          

C. other than do they any   

D. than any other

A. Jane wondered why she hadn't got a computer in the previous time.

B. Jane wondered why she haven't got a computer in the previous time.

C. Jane wondered why she didn't get a computer in the previous time.

D. Jane wondered why not she got a computer in the previous time.

A. a rare condition that   

B. a rare condition

C. that a rare condition   

D. is a rare condition

A. the level of lighting       

B. light level               

C. leveling of light          

D. lighting is level