Sam is a very good man. He always tries __________ best to help others.
—Are these girls your sisters? —No, ________ aren’t.
Jack is my uncle. His daughter is my ________.
—This is a photo ________ my aunt. —It is nice.
I have ________ aunt and ________ uncle.
Lily works as _______ as Lucy.They both get good grades. A.hard B.harder C.hard---working