—Is Lisa reading books?
—Yes，________.
A．she isB．she'sC．She is
________he often clean the room on Sundays?
A．Do B．Does C．Did
Spring is coming.It's time________.
A．to plant seeds B．plant seeds C．planting seeds
—Is there an apple on the plate?—Yes，________.
A．there isn't B．there's C．there is
Boys are________football now.
A．playingB．to play C．play