选择.Sandra didn't come to school today. I think she ____ be ill. A. shall B. can C. must D. shoulD是should !!!!!!!

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选择.Sandradidn''tcometoschooltoday.Ithinkshe____beill.A.shallB.canC.mustD.shoulD是should!!!!!!!选择.Sandr

选择.Sandra didn't come to school today. I think she ____ be ill. A. shall B. can C. must D. shoulD是should !!!!!!!
选择.Sandra didn't come to school today. I think she ____ be ill. A. shall B. can C. must D. shoul
D是should !!!!!!!

选择.Sandra didn't come to school today. I think she ____ be ill. A. shall B. can C. must D. shoulD是should !!!!!!!
C.must
我想他一定是病了