1.Allanimalsneedairand___.
A.soneedplantsB.sodoplants
怎么判断need在这儿是实意动词还是情态动词呀?选哪一个呢?另外一个为什么不对呢?
2.Isupposeshe__beaboutfiftywhenshedied.A.wouldB.mayC.should
3.Ifyouundertakethisprojectyouareboundto__manydifficulties.
A.encounterB.facewith
选什么?
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