You should cut______an onion and a tomato first and then put them_____the blender.
A．up，into B．down， into C．up，on D．down，on
—What' the next step?
—Oh，please put some meat between two________of bread.
A．piece B．piece's C．pieces D．pieces'
—Will there be more tall buildings in 50 years?—________.
A．No，there isn't B．No，they aren't
C．No，there won't D．No，they won't
—________will your father come back，Tony? —In three days.
A．How long B．How soon C．How D．How many
I'm sure that there____more trees in our country in the future.
A．have B．are C．will have D．will be
—Mike，you________play the piano well if you don't work hard.
—I know，Mom.
A．don't B．won't C．doesn't D．didn't
