In 1979 lack of rain reduced India's rice production to about 41 million tons, nearly 25 percent less than those of the 1978 harvest.
less than those of the 1978 harvest
less than the 1978 harvest
less than 1978
fewer than 1978
fewer than that of India's 1978 harvest
those 是个代词,在平行结构中,不是所有的平行部分都用“that of ”来表达就是最对的,如果that or those找不到指代对象的话也是不能乱用的。
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