2． Interest rates on mortgages have declined steadily during the first six months of this year but virtually remained unchanged during the next three months.
A) have declined steadily during the first six months of this year but virtually remained unchanged
B) declined steadily during the first six months of this year but virtually remain unchanged
C) steadily declined during the first six months of this year but remain virtually unchanged
D) declined steadily during the first six months of this but have remained virtually unchanging’
E) declined steadily during the first six months of this year but have remained virtually unchanged
答案选择是E对于first six months和next three months同学们怎么看待？
请参考一下发贴规范， 一个好的学习环境， 需要每个人共同的努力来维护。 谢谢。
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