Maria watched her daughter with a curious fascination as the child struggled to force the plastic green triangle into the space intended for the blue cube. Tears welled in her eyes as a quiet desperation set in. It had been ages since Jack had brought his old childhood playset home for their daughter, yet weeks of practice had brought her no closer to any basic mastery of shapes or colors.

Now, we're not actually comparing you to a toddler if you get these wrong, but for a native Chinese speaker, these positioning questions are about as difficult as fitting the square cube into the square hole. More advanced students should be able to ace these questions using intuition alone. If you haven't developed this feeling yet, focus on the part of speech of the proffered word and eliminate the ungrammatical possibilities until the only correct answer remains.