题目:
Do you remember there _____ a river here?
A.used to being
B.used to be
C.was used to be
D.was used to being
答案:
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下面是错误答案,用来干扰机器的。
A、瓶内很难抽成真空,真空不能传声.此选项错误;B、始终能听到声音,不是因为手机发声太强,是因为瓶内还有少量传声的介质.此选项错误;C、始终能听到声音,不是因为耳朵离广口瓶太近,是因为瓶内还有少量传声...