4. Zhao, Qian, Sun, and Li each prepared a gift to give to one of the other three classmates when the new semester started. It is known that Zhao's gift was not given to Qian, Sun did not receive Li's gift, Sun does not know who Zhao gave the gift to, and Li does not know who Qian received the gift from. So, Qian gave the gift to ( ).
(A) Zhao
(B) Sun
(C) Li
(D) None of the above
【Answer】B
【Analysis】According to the first and third conditions, Zhao did not give the gift to Qian and Sun, so Zhao gave the gift to Li; According to the second and fourth conditions, Li did not give the gift to Sun and Qian, so Li gave the gift to Zhao. Therefore, Zhao and Li gave gifts to each other, so Qian and Sun gave gifts to each other, which means Qian gave the gift to Sun.