32. From the passage we know that Symbion Inc. ________.
A) has been banned by the government from producing artificial hearts
B) will review the effects of artificial hearts before designing new models
C) may continue to work on new models of reliable artificial hearts
D) can make new models of artificial hearts available on the market in 10 to 20 years
33. The new models of artificial hearts are expected _________.
A) to have a working life of 10 or 20 years
B) to be set fully in the patients chest
C) to be equipped with an external power source
D) to create a new passage for infection
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