A：A12O3、SO2、CO2、SO3
B：C12、A12O3、N2O5、SO3
C：CO2、C12、CaO、SO3
D：SiO2、N2O5、CO、C12
_________ he was very tired, he continued working in his office.
— What did your father do yesterday?
— He ________ at home and read a book.
go, they, with, love, tomato, birthday
