You'd expect more from an English teacher on a grammar quiz, but that's what I got on this one.  Take it first, then read my scores below:

1. Totally missed the subject-verb disagreement.  Forgot to trim the sentence, something for which I would lambast my students: if you cross out all the interrupters, prepositional phrases and modifiers, the subject and verb practically jump into your lap.  I didn't see it.

2. Correct.

3. Technically, there's nothing wrong with this one except that the author meant "ensure."  I actually thought "insure" made sense, though.  I don't know much about cars, but I would guess car manufacturers must have some sort of policy to protect themselves from lawsuits.  However, I'm not going to argue the point.  It's just one point.  Another mantra from me to my students.  "But Mrs. LOWE!  That's so unFAIR!"

4. Not anything technically wrong with this one, either.  "On the lam" is an accepted colloquialism.  I'd allow it in a paper unless it was the Harvard Law Review or something.  But I'm not going to argue.  The Times is the Times.

5. Correct.

6. "Who" vs. "Whom" is tricky for me.  I think the real trouble is that I trust the Times.  If they said "Whom," it must be right.  Even when I know I'm looking for an error, I guess!

7. Correct.

8. Correct.  "Number" vs. "Amount" is one of my pet peeves.  As is "Less" vs. "Fewer."  Next time you see a "10 Items or Less" sign, you tell them Emily says to watch their backs.