----Did Jim come?----I don’t know. He _______ while I was out.
At 13,Samuel received a training course in drawing for three years,________ he got a good opportunity for further development.
Her sister has become a lawyer,________ she wanted to be.
Let’s talk about the persons and the things ________ we can remember.
So far all cloned animals have suffered from some different serious disorders,________ dying soon after birth.
The students ________ are expected to pass.