问题
选择题
He has made some spelling mistakes in the paper; ______, they are not serious.
A．but
B．therefore
C．even if
D．however
答案
答案：D
本题的含义是他虽然在试卷上犯了一些拼写的错误，然而不是很严重，表示部分转折英文中通常用however，故本题选D。
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