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2011-09-15 13:31:00   来源：作文地带整理    双击单词自动翻译

　　(A) its merits， the proposal to tax

　　(B) its merits may be， the proposal of taxing

　　(C) its merits as a proposal， taxing

　　(D) the proposal's merits， to tax

　　(E) the proposal's merits are， taxing

　　6 The key to control over the Eurasian steppes lay in the nomad's ability to use the horse both as a means of transport but also as an effective military tool.

　　(A) but also as

　　(B) or as

　　(C) and as

　　(D) or

　　(E) and also