It is often recommended that children ________chances to get close to nature.
A．a(chǎn)re offeredB．be offeredC．should offerD．must be offered
B
考查虛擬語氣。Recommend推薦，建議，后面的賓語從句要用（should）+do的虛擬語氣，排除A,D；且主語children和offer之間是動賓關系，所以用被動語態(tài)。選B。
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