Q17:

Today’s technology allows manufacturers to make small cars more fuel-efficient now than at any time in their production history.

1. small cars more fuel-efficient now than at any time in their
2. small cars that are more fuel-efficient than they were at any time in their
3. small cars that are more fuel-efficient than those at any other time in
4. more fuel-efficient small cars than those at any other time in their
5. more fuel-efficient small cars now than at any time in

The answer is C.

I wonder what the mistakes are in D, Is "more fuel-efficient small cars" wrong or "in their production history" wrong?

Thanks!

In D, the "fuel-efficient" and "those(small cars)" has been compared

mistakenly.

oh...yes...

those should refer to "small cars" but in D, it will be mistakenly refered to as

"more fuel-sufficient cars"...

Thanks~

more fuel-efficient small cars 和small cars more fuel-efficient 相比，后者修饰

更清晰，也就是说more在more fuel-efficient small cars 中可以修饰fuel-efficient ，

也有可能修饰cars,而后者small cars more fuel-efficient 则更清晰，况且比较对象是

fuel-efficient 而不是cars