They experimented _____the new medicine _____animals. A.on; to B by ; on C.with ; on D with; to
The skirt is too big for me. I wish I _______ it last Sunday.
The young lady has a ________ for helping disabled people.
Why are you doing that? If I ____you, I’d stop.
Mr. Black was old, but able to _______quickly to changes in technology.
When I met Becky, she told me that she ______ for an interview the next day.