2. 外语
  3. At the later stage of development, there ______new problems which first seemed insoluble.

At the later stage of development, there ______new problems which first seemed insoluble.

admin2010-02-17  41
问题 At the later stage of development, there ______new problems which first seemed insoluble.
选项 A、rose
B、arose
C、resulted
D、happened
答案B
解析 这里单词arise表示产生了，出现了。
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