If you join the club you must______by its rules.
If you join the club you must______by its rules.
If you join the club you must______by its rules. A: comply B: abide C: observe D: obey
If you join the club you must______by its rules. A: comply B: abide C: observe D: obey
Themedicine（）cool,cleananddry. A: must keep B: must be kept C: must be keep D: must be in
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
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
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
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 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
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
Old people () carefully. A: must be listened B: must be listened to C: must listen to
He looks tired. He ______ a sleepless night. A: must have been B: must have had C: must be D: must have
He looks tired. He ______ a sleepless night. A: must have been B: must have had C: must be D: must have