—How often do I need to feed the dog? —It _______food every day，or it will be hungry． A: A．must give B: B．must be give C: C．must be given D: D．must be gave

Themedicine（）cool,cleananddry. A: must  keep B: must  be  kept C: must  be  keep D: must  be  in

The flowers ( ) every day. A: must be water B: must be watered C: must watered D: must water

Such films _____ by children like you. A: must be not seen B: must not be see C: must not seen D: must not be seen

These books ______ good care of. A: must taken B: must take C: must to take D: must be taken

The medicine （） cool, clean and dry. A: must keep B: must be kept C: must be keep D: must be i

The flowers （） often. A: must be water B: must be watered C: must watered

Old people () carefully. A: must be listened B: must be listened to C: must listen to

Your grandmother____________ to the hospital at once． A: must send B: must be sent C: must to be send

He looks tired. He ______ a sleepless night. A: must have been B: must have had C: must be D: must have