Whether true bulb, rhizome, or tuberous root, all bulbs produce flowers year after year. The true bulbs are the daffodils and tu

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问题 Whether true bulb, rhizome, or tuberous root, all bulbs produce flowers year after year. The true bulbs are the daffodils and tulips. Rhizomes produce the calla lily; tuberous roots produce the dahlia and begonia. Some bulbs are hardy, able to stay in the ground all winter. Others are tender and must be dug up and stored when temperatures drop.
The word Others in the passage refers to

选项 A、rhizomes
B、tuberous roots
C、dahlia and begonia
D、bulbs

答案D

解析 The subject of the previous sentence is some bulbs. Logic tells you that others refers to bulbs.
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