It is true that ______ a wild plant into a major food crop such as wheat requires much research time.

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问题 It is true that ______ a wild plant into a major food crop such as wheat requires much research time.

选项 A、multiplying
B、breeding
C、magnifying
D、generating

答案B

解析 breed意为“培养,养育”;multiply意为“乘,增多”:magnify意为“放大,夸大”:generate意为“产生”。
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