____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

垂直斜视下列说法不正确的是（）

A．成年后获得性垂直斜视较常见

B．可由先天性解剖异常引起

C．其命名习惯根据注视眼而定

D．治疗不一定通过手术方式、

E．发病年龄在6～8岁以后则常出现复视现象