2. 外语
  3. Orchid seeds take (up to) eighteen months to mature (before they) sprout, and the young plants (may need) another two years to (

Orchid seeds take (up to) eighteen months to mature (before they) sprout, and the young plants (may need) another two years to (

admin2004-12-30  31
问题 Orchid seeds take (up to) eighteen months to mature (before they) sprout, and the young plants (may need) another two years to (reach at) the flowering stage.
选项 A、up to
B、before they
C、may need
D、reach at
答案D
解析
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