问题
单项选择题
When he suddenly（） up the subject of genetic engineering, there was an embarrassed silence.
A.took
B.brought
C.showed
D.came
答案
参考答案：B
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When he suddenly（） up the subject of genetic engineering, there was an embarrassed silence.
A.took
B.brought
C.showed
D.came
参考答案：B
