1.The computer of this kind can work ______ than the one of that kind.
A. hundred of times faster
B. a hundred time faster
C. hundred times faster
D. hundreds of times faster
2.When I was young， my grandmother told me that the earth ______ round.
A. is
B. was
C. has been
D. had been
3.—Do you know Jack well?
—Certainly. We ______ friends since ten years ago.
A. were
B. have made
C. have become
D. have been
4.These hamburgers ______ nice， so they have all ______ out.
A. taste， sell
B. are tasted， sell
C. taste， been sold
D. are tasted， been sold
5.We now have ______ fast ways of traveling that this big ocean seems to have grown smaller.
A. so
B. such
C. so a
D. such a
