----Where is Tom?----He hasn't come to school today.I think he___be ill.A.has toB.should C.may D.need

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----WhereisTom?----Hehasn''tcometoschooltoday.Ithinkhe___beill.A.hastoB.shouldC.mayD.need----WhereisT

----Where is Tom?----He hasn't come to school today.I think he___be ill.A.has toB.should C.may D.need
----Where is Tom?----He hasn't come to school today.I think he___be ill.A.has to
B.should C.may D.need

----Where is Tom?----He hasn't come to school today.I think he___be ill.A.has toB.should C.may D.need
C
表可能性

C.
may 表把不大的推测,若把握大,用must be ill

C 只能说“他可能生病了”