In most cases, you can transplant a tree successfully, at any time, if you follow the instructions for planting a tree. The most

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问题     In most cases, you can transplant a tree successfully, at any time, if you follow the instructions for planting a tree. The most important thing is to dig out enough roots, but this process is difficult with a large tree.
    When you dig out the tree, leave a ball of earth around its roots. This ball of earth should measure about a foot wide for every inch of the tree trunk’s diameter. Dig deep enough to avoid cutting off too many taproots.
    It is wise to call in a professional tree expert to transplant a tree more than a few inches in trunk diameter.
The larger the trunk of the tree you are transplanting, ______.

选项 A、the less it matters whether you call in a tree expert
B、the more you should avoid cutting off the taproots
C、the larger the ball of earth you must leave around the roots
D、the easier it is to dig out sufficient roots

答案C

解析 推断题型从第二段第一、二两句得知:当你要挖出一棵树时,要在树的根部留一团泥土。这团泥土的尺寸应以树干的直径为准;树干直径每增长一英寸,这团泥土就应增加大约一英尺。因此本题是问:当移植树时,树干越大,……。答案应该是C:你在根部所留的泥土应越多(包根部的泥团应越大)。
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