18. Since 1970 the number of Blacks elected to state and federal offices in the United States has multiplied nearly four times.
(A) has multiplied nearly four times
(B) has almost quadrupled
(C) has almost multiplied by four
(D) is almost four times as great（B）
(E) is nearly fourfold what it was
BTW，请问表达加倍的方法。
yes, 或者是five times as many as.
P.S. 具体哪种形式，还要看具体题目。比如OG89还是用的four times as many as, 不是quadruple。
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