Plastic heart valves and other human "spare parts" have __________ many recent developments in surgery.A) been possible B) become possibleC) been made possible D) made possible
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![Plastic heart valves and other human](/uploads/image/z/11873681-17-1.jpg?t=Plastic+heart+valves+and+other+human+%22spare+parts%22+have+__________+many+recent+developments+in+surgery.A%29+been+possible+B%29+become+possibleC%29+been+made+possible+D%29+made+possible)
Plastic heart valves and other human "spare parts" have __________ many recent developments in surgery.A) been possible B) become possibleC) been made possible D) made possible
Plastic heart valves and other human "spare parts" have __________ many recent developments in surgery.
A) been possible B) become possible
C) been made possible D) made possible
Plastic heart valves and other human "spare parts" have __________ many recent developments in surgery.A) been possible B) become possibleC) been made possible D) made possible
选C,这里出现了recent ,所以用的完成时态.make...possible 使...成为可能,这里把宾语提去当主语了,所以用被动.
祝开心~!
D) made possible
made的宾语是many recent developments in surgery,因为过长,再者后面又带有宾语补足语possible,所以被后置,把宾补possible提前。