1. It is known that water is not______endless resource, nor______ that can be made once more.
A. The; \ B. an; one C. an; that D. \ ; one
2. These two English words are __________in meaning.
A. controversial B. incredible C. confidential D. identical
3. Driving a car needs a lot of practice and this is true _________ studying English.
A. of B. to C. in D. at
