A family are preparing ________ a barbecue by the river.
[ ]
A．to
B．for
C．on
D．at
That's my ________ sister.
________ everyone here?
Their classroom is small.________ big.
7:45 is ________.
That's ________ bedroom.
How old is ________ mother?
Tom is ________ boy. He is ________ American boy.
________ are in the same class.
交际题
: ________.
:
________.