A) capable C) possible
B) able D) likely

A．has wide interests and reads original books or articles
B．is a person with originality, which comes from his diverse knowledge
C．not only reads widely but also cultivates diverse interests
D．benefits more from teaching than from his research

A．superficial reading is valueless
B．a successful scientist usually confines his reading to the problem under investigation
C．a research worker cannot benefit from superficial and "skim" reading over a wide field if he doesn't have a background of knowledge
D．if a research worker has wide interests, he is sure to succeed in his own specialty