Unplug all wires connected to the tower and if there is a power switch on the back, switch it off. Take out the screws on the back of the tower, take out the panel, then take out the motherboard tray. Take the motherboard and screw it on the motherboard tray then slide it back into the case. Firmly insert RAM sticks into the long and narrow slots usually located at the top right of the motherboard. Carefully place the CPU into the socket that is square shaped on the motherboard then place the CPU fan For video cards, look for a slot about the length of your middle finger and has very small lever, Take out the small case panel about the size of your finger on the back and firmly insert the card Into the slot, make sure the back of the card comes outside. For sound/ network cards look for a slot similar to the video card slot, but slightly shorter dos uo and without the lever. Slowly slide the hard drive into the hard drive bay usually located at the front of the tower then connect the cables from the back of the hard drive the motherboard. CD/DVD drives are similar to hard drives, just slide it into the bay at thetop (right or left depending on the panel that is open) and connect the wires. For audio devices, match the colours and USB is pretty much selfexplanatoryIf you have a video card the back of it should be sticking outside which is where you connect the monitor cable to, unless there is no video card then you connect the cable to the motherboard. Video cards nowadays come with adapters for older monitors so make sure to connect the adapter to the back of the video card before plugging in the monitor. For audio devices, match the colours and USB is pretty much selfexplanatory

20. "Take the motherboard and screw it on to the motherboard tray then slide it back into the case." The pronoun 'it in the sentence above refers to
a. the motherboard
b. the motherboard case
c. the panel
d. the RAM stick e. the USB
21. ". and USB is pretty much self explanatory." What is the meaning of the italic word?
a. A word with no meaning
b. Statement explaining something C. Giving reasons or details that explain something
d. Explaining something to oneself e. Giving some connection to the cable ...​​