The methods of communication used during the war were primitive．A:simpleB:reliableC:effectiveD:alternative
The methods of communication used during the war were primitive．
A:simple
B:reliable
C:effective
D:alternative
B:reliable
C:effective
D:alternative
参考解析
解析：本句意思：在战争时代使用的联络方式是简单的。primitive意为“原始的，简单的，过 时的”，与simple（简单的）意思相近。reliable可靠的，可信赖的；effective有效的；alternative可 替代的，可供选择的。
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