3.Noise disturbance ( ) harmful in ChinaA:didn’t use to be considered B:usedn’t to considered C:didn’t used to consider D:aren’t used to consider 选那一个正确的答案

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3.Noise disturbance ( ) harmful in ChinaA:didn’t use to be considered B:usedn’t to considered C:didn’t used to consider D:aren’t used to consider 选那一个正确的答案
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3.Noise disturbance ( ) harmful in ChinaA:didn’t use to be considered B:usedn’t to considered C:didn’t used to consider D:aren’t used to consider 选那一个正确的答案
3.Noise disturbance ( ) harmful in China
A:didn’t use to be considered
B:usedn’t to considered
C:didn’t used to consider
D:aren’t used to consider
选那一个正确的答案

3.Noise disturbance ( ) harmful in ChinaA:didn’t use to be considered B:usedn’t to considered C:didn’t used to consider D:aren’t used to consider 选那一个正确的答案
选a
use to be/do 过去常常
这里的噪音应该是被考虑,所以用被动 be considered
b c 没用被动
D的话就是be used to do 意思是被用来做.显然也不对