题目内容

In the United States nearly _________ organ transplants were done in 2017.

A. 25,000
B. 30,000
C. 35,000
D. 45,000

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More than ____ million people need organ transplants in China.

A. 1
B. 1.5
C. 2
D. 3

About_________bonemarrowtransplantsareperformedannuallyintheUSAtotreatblooddisorderssuchasleukemia and anemia, and inupto30%ofcases,thedonorisarelative,usuallyasibling.

A. 15,000
B. 20,000
C. 25,000
D. 30,000

Worldwide,____millionpotentialbonemarrowdonorshavesignedupwithbonemarrowregistries,including8millionAmericans.

A. 10
B. 12
C. 14
D. 16

Unlikeorgans,mosttissues(withtheexceptionofcorneas)canbepreserved and storedforupto____years,meaningtheycanbe"banked".

A. 1
B. 2.5
C. 5
D. 8