21.—Mary works hard at English.
—_______ and_______.
A.So does she; so you do
B.So she will; so do you
C.So you do; so does she
D.So she does; so do you
22.—______ do you think of the book written by Dr.Wang?
—______ my opinion, it is not very interesting.
A.What; By B.What; In
C.How; To D.How; In