— When______ you______ the smart hat?— While my parents were waiting for the plane at the airport.A. did, buy B.do,buy C.were,buying
I have a basketball, ______ I don’t have a volleyball.
I play ______basketball every day.
This is ______interesting book.
This is _______pen.. _______ pen is nice
My father likes(喜欢) soccer. He thinks(认为) it is ________.