38. I still remember the summer _____ I went backpacking in Scotland with my colleagues.
(A) how
(B) where
(C) why
(D) when
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統計: A(103), B(396), C(90), D(1585), E(0) #2764494
統計: A(103), B(396), C(90), D(1585), E(0) #2764494