Right: Her products are unusual;many consider them unique.
Wrong: Her products are unusual; many consider these unique.
但是，又有一道prep题。
prep1-34正确答案:
Besidesadding complementary flavors to many foods, hot sauces stimulate the releaseof endorphins in the brain, just as exercise does, and these have a pain-relievingeffect like morphine's.
其中these指代endorphins。