Step 1-- Press ctrl-shift-I while on Membean
Step 2-- Open the HTML Head tag (press the arrow next to <head>)
Step 3-- Find the lines including <link href="..." type="text/css"> and right click on them. Click "Delete Element". Repeat until Step 4 is satisfied.
Step 4-- There is now a Pass button at the bottom left of the screen. Click it to skip the question and mark it correct. You can also find a built in dictionary. Make sure you don't press the pass button too quickly and press the fail button every so often so the teacher doesn't get suspicious!