Fibers of hair and wool are not continuous and must normally be spun into thread

游客2023-11-06 19

问题 Fibers of hair and wool are not continuous and must normally be spun into thread ______ woven into textile fabrics.

选项 A、as are they
B、when to be
C、that they are
D、if they are to be

答案 D

解析 be to表示将来。

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Fibersofhairandwoolarenotcontinuousandmustnormallybespunintothread