— Your classroom is very clean.
—Yes, it ______ every day.
A．is cleaned
B．cleans
C．is cleaning
— Amy, I called you yesterday evening, but nobody answered the phone.
— Oh, I _____ a walk with my mother at that time.
A．take B．took
C．am taking D．was taking
–When _______ your mother _______ you that blue dress, Lucy?
–Sorry, I really can’t remember. Maybe two or three weeks ago.
A．will; buy
B．does; buy
C．did; buy
—What were you doing this time yesterday?
—I ____on the grass and drawing a picture.
A．sit B．sat
C．am sitting D．was sitting
Although Bill isn’t rich enough, he often ______ money to the poor.
A．will give B．was giving
C．gives D．gave
Great changes _________ in Tongren in the past five years.
A．have happened B．have taken place
C．have been happened D．have been taken place
