—I always look out before crossing the street.
—You are right. You can't be too______.
A. nervous
B. careful
C. careless
D. hurried
－ Must we clean the room before we leave?－ No , you_____A.mustn'tB.can'tC.needn't
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－－Must we finish our homework now? －－No, you ______. You _______ finish it after school.A.needn't , mayB.mustn't , mayC.can't , canD.needn't , must
“Must I finish my homework now?” “No, you() . But you() finish it this evening. ”A. mustn’ t…mustB. needn’ t…mustC. can’ t…canD. can’ t…must
---Good morning. I've got an appointment with Miss Smith in the PersonnelDepartment.--Ah, good morning. You ____be Mrs. Peters.A. mightB. mustC. wouldD. can
-Mayweleavetheclassroomnow?-No,you______.You______toleaveuntilthebellrings.A.mustn’t,areallowedB.don’thaveto,aresupposedC.needn’t,aren’tallowedD.can’t,aren’tsupposed
Must we clearn the room before we leave?No, you _______A.mustn'tB.can'tC.needn't
Must I stay at the office this afternoon? ---No, you ______.A、don’tB、needn’tC、don’t needD、can’t
