Everybody needs calcium, but it is quite possible for a similar person to be totally healthy by eating only________.
A．a(chǎn)s half much　B．a(chǎn)s much half
C．half as much as　D．half as much
D
考查倍數(shù)表達(dá)。該句運(yùn)用的是“倍數(shù)＋as＋...＋as＋比較對(duì)象”結(jié)構(gòu)，eating only后面部分的完整表達(dá)應(yīng)為half as much calcium as the other person eats。其省略形式為half as much，故選D項(xiàng)。
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