TOEFL Reading: ETS-TOEFL阅读机经 - H67TK56G0P2WB6J6L$

According to paragraph 1, in what way are the most primitive termites like cattle A. They have two ways of breaking down the cellulose in vegetation. B. They get no nutritional benefit from eating vegetation. C. Their digestive chambers are not airtight. D. They rely on bacteria to process the vegetation they ingest.