---Have you finished your homework? --- ________. Just half of it.How about you?
He could hum songs and difficult______
-__________ didn’t she come to school last night? -Because she was ill.
Deng Yaping went to Tsinghua University and __________ English and management.
—_________ did your play soccer? —For three years.
I have a _________ sister. She is two years old.