問題詳情

Researchers say that highly trained dogs are able to reliably sniff out lung cancer in human breath. In itsearly stages, lung cancer has few symptoms, (26) _____ it difficult for doctors to catch it early. But previouscases show that dogs have alerted their owners (27) _____ undiagnosed cancers by repeatedly pawing ornosing a(n) (28) _____ body part. Researchers think dogs are able to smell disease by picking up on minutechanges in compounds called VOCs that (29) _____ chemical signatures in the body. Dogs then (30) _____the smell into a recognition system, which is useful for diagnostic purposes in human disease.
26.
(A)make
(B) made
(C) making
(D) to make

參考答案

答案：C
難度：簡單0.803922
統計：A(6),B(2),C(41),D(1),E(0)

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