They are listening to a talk ____how ___pets.A on;keeping B about;keep C for;to keep D on;to keep

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They are listening to a talk ____how ___pets.A on;keeping B about;keep C for;to keep D on;to keep

选D
手下今年AB是错误的,how to do sth
然后有词组
a talk on ...
一个关于...的报告

C