--- Steven, where did you come across the famous novelist from England? --- Believe it or not, it was in the supermarket ________ we went shopping last Sunday.
A.
which
B.
that
C.
there
D.
where
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参考答案:
举一反三
【简答题】上升型曲线规律:对任意的 x A、 x B∈区间(a,b),当 x A< x B时,都有 yA yB成立。