1. It is used to let heavy weights as the jack does. 

A. inclined plane

B. lever

C. wedge

D. screw

2. They are widely used in threaded fasteners to hold objects together 

A. screw

B. pulley

C. inclined plane

D. wedge

3. They are used to drive or fasten wood of metal together or to remove the screw to unfasten them

A. pulley

B. screw

C. wedge

D. lever

4. A metal fastener having a tapered shank with a helical thread, and topped with slotted head, driven into wood or the like rotating, especially by means of a screwdriver. 

A. screw

B. inclined plane

C. pulley

D. lever

nonsense=report

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