David Foster Wallace grammar challenge

From a nonfiction workshop taught by David Foster Wallace at Pomona College, a 10-question grammar worksheet that is titled:

IF NO ONE HAS YET TAUGHT YOU HOW TO AVOID OR REPAIR CLAUSES LIKE THE FOLLOWING, YOU SHOULD, IN MY OPINION, THINK SERIOUSLY ABOUT SUING SOMEBODY, PERHAPS AS CO-PLAINTIFF WITH WHOEVER’S PAID YOUR TUITION

Here are the answers and explanations. I think I got 0/10 and am preparing my lawsuit.

• David Foster Wallace
• language