单项选择题
A.assumed B.presumed C.resumed D.consumed
When she retired she did a lot of（）work for the Red Cro...
单项选择题When she retired she did a lot of（）work for the Red Cross.
A.valid B.portable C.prosperous D.voluntary
What these young men were doing（）a threat to the safety...
单项选择题What these young men were doing（）a threat to the safety of the whole neighborhood.
A.constructed B.contracted C.constituted D.contributed
Doctors hope to（）a human heart into the patient within ...
单项选择题Doctors hope to（）a human heart into the patient within the next few days.
A.transfer B.transform C.transplant D.transport
