________ the quality of schooling is high, parents are eager not only send their children to school. but also to ________ them there.

　 A. Where, keep　　　 B. Where, leave　　 C. When, keep　　　 D. When, leave

____the quality of schooling is high,parents are eager not only to send their children to

    school,but also to____them there.?

    A.Where;keep        B.Where;leave?

    C.When;keep         D.When;leave?

____the quality of schooling is high,parents are eager not only to send their children to school,but also to____them there.

1. A.
   Where;keep
2. B.
   Where;leave
3. C.
   When;keep
4. D.
   When;leave