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题库 / Prep2007E2-SC-104
The yield per acre of coffee berries varies enormously in that a single tree, depending on both its size and on climate and altitude, could produce enough berries to make between one and twelve pounds of dried beans a year.
enormously in that a single tree, depending on both its size and on climate and altitude, could produce
enormously in that a single tree, dependent on its size and also on climate and altitude, is able to produce
enormously, because a single tree, depending on its size and on climate and altitude, is able to produce
enormously, because a single tree, being dependent on its size, climate, and altitude, is capable of producing
enormously, because a single tree, dependent both on its size as well as on climate and altitude, could produce
could/would/might/should表示：
（1）过去将来时
（2）委婉语气
（3）虚拟语气，表示与未来/现在相反的情况
can/able/capability：
can：有生命+无生命，主动+被动
be able to：有生命，如人、动物、植物、细菌，主动
be capable of：无生命，也可以用于人或动物，主动
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