GMAT Verbal Section | Re: Think like the testmaker?

Which of the following are incorrect choices on the GMAT? I am having a hard time convincing myself that choice 1 is correct since Veritas uses this verbatim.

1. ThinkLike the testmaker .
2. Thinkas the testmaker .
3. Thinkas the testmaker does .
4. Thinkas does the testmaker .
5. Thinklike the testmaker does .

Requesting experts to please clarify - It might be a very easy question for most of you but still please take a moment and help me out.