21．—When did you last see Shelly?
—On ．Sunday of last December at celebration of her 40th weddinganniversary
A．不填； the B． a: 不填 C． the: a D．a; the
22．The sale of the company's new product is good．It has ．two million dollars so far
A． carried on B．kept up C brought in D．consisted of
