题目:
Today's technology allows manufacturers to make small cars more fuel-efficient now than at any time in their production history.
选项:
A、small cars more fuel-efficient now than at any time in their
B、small cars that are more fuel-efficient than they were at any time in their
C、small cars that are more fuel-efficient than those at any other time in
D、more fuel-efficient small cars than those at any other time in their
E、more fuel-efficient small cars now than at any time in
答案:
C