That storybook is very _________. The children are _________ in it.
What's your mother's ________?A.work B.do C.job
What class are you ________?A.at B.in C.on
How old ________ your brother?A.is B.are C.does
Where ________ your father now?A.is B.are C.was
I can't ________ my key.A.look for B.find C.look