问题补充：
Between the two parts of the concert is a break, the audience can buy ice-cream.
A. when
B. where
C. that
D. which
答案：
(答案→)A. when
B. where
C. that
D. which
解析：考查定语从句。先行词为break指时间。定语从句the audience can buy ice-cream成分很完整，所以使用关系副词。因为先行词指时间，所以使用when.
