An increasing number of students,year by year,across China  _______ hard to realize their dream of studying abroad.

A．try

B．have tried　

C．will try

D．are trying

中轻度糖尿患者宜选用的降糖药是（）

A.阿卡波糖

B.氯磺丙脲

C.精蛋白锌胰岛素

D.甲苯磺丁脲

E.正规胰岛素