(2013·吉林長(zhǎng)春三校高三調(diào)研)It is important to introduce children to healthy nutritious foods from ________ they begin to eat solids.
A．whatB．when
C．thatD．which
B
B　考查名詞性從句。句意：從孩子可以吃固體食物開(kāi)始就引導(dǎo)他們食用健康營(yíng)養(yǎng)的食物是很重要的。when在此引導(dǎo)賓語(yǔ)從句，作介詞from的賓語(yǔ)，且在從句中作時(shí)間狀語(yǔ)。
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