4. Although we all need to spend time alone from time to time, human beings are _____ by
nature. Everyone needs to be with friends from time to time.
(A) dolorous
(B) infectious
(C) facetious
(D) gregarious
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統計: A(16), B(24), C(23), D(163), E(0) #3129231
統計: A(16), B(24), C(23), D(163), E(0) #3129231