—What’s ______ most useful invention in
题型:选择题
问题:
—What’s ______ most useful invention in the 20th century?
—______ computer, I think.
A.the, A
B.a, A
C.the, The
D./, The
—What’s ______ most useful invention in the 20th century?
—______ computer, I think.
A.the, A
B.a, A
C.the, The
D./, The