When I came back yesterday evening, my brother _______ his homework.A. is doing B. has done C. was doing
-This is your eraser. Here you are. -Thank you,Mr. Hu. -_____________.
—________ is that quilt? —It’s black.
-Are these your parents ? - _____ .
_____David and Jim like bananas?
Where is the clock? Is _____ on the desk?