单选题Einstein’s theory of relativity seemed hard to believe at the time _____.Awhen he first introducedBthat he first introduced itChe first introducedDwhich he first introduced it
单选题
Einstein’s theory of relativity seemed hard to believe at the time _____.
A
when he first introduced
B
that he first introduced it
C
he first introduced
D
which he first introduced it
参考解析
解析：
句意：爱因斯坦第一次提出相对论时，好像很难令人相信。at the time后可跟when或者that引导的定语从句，A项少it。B项that引导定语从句修饰time。
句意：爱因斯坦第一次提出相对论时，好像很难令人相信。at the time后可跟when或者that引导的定语从句，A项少it。B项that引导定语从句修饰time。
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