19．－The book by Tony Garrison is of great use to our course.－But I think this one isworth

问题补充：

19．－The book by Tony Garrison is of great use to our course.

－But I think this one isworth reading.

A. more

B. most

C. better

D. Best

答案：

A. more

B. most

(答案→)C. better

D. Best

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