问题
选择题
. ----Was everyone here
----No. Some students ______traffic on the way
A．caught
B．was caught in
C．was caught by
D．caught hole of
答案
答案：B
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. ----Was everyone here
----No. Some students ______traffic on the way
A．caught
B．was caught in
C．was caught by
D．caught hole of
答案：B
已达平衡状态的是[ ]