22．In the daytime， when you dive in the sea， you ________
A． can see everything green and blue
B． can- t be in danger
C． can catch nothing
D． can't see anything clearly
－－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
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-Mayweleavetheclassroomnow?-No,you______.You______toleaveuntilthebellrings.A.mustn’t,areallowedB.don’thaveto,aresupposedC.needn’t,aren’tallowedD.can’t,aren’tsupposed
If you had been have yesterday，you______(see)his father.
This is very important. You_____remember to shut down your computer everyevenlng。A. oughtB. needC. mustD. can
()you()Jane last month? B: No, I().A、*/saw/didn’tB、Did/see/didn’tC、Did/saw/didn’tD、id/see/did
Must we clearn the room before we leave?No, you _______A.mustn'tB.can'tC.needn't
You ( ) Jenny at the meeting this morning because she left for Hong Kong last night.A、wouldn’t have seenB、shouldn’t have seenC、mustn’t have seenD、can’t have seen
