Founded in 1983, the magazine increased its circulation more than double since then,and its advertising.
(A) increased its circulation more than double since then
(B) has since increased its circulation more than double
(C) has since more than doubled its circulation
(D) since then more than doubled its circulation
(E) more than doubled its circulation since then
答案是C。我的问题是C和B中的since短语完整表达了吗?since then中的then在B、C中是可以省略的呢,还是打印错误啊?
请各位前辈指点,谢谢! |