Sarah felt like         when she found out that she had been chatting online with a boy student of her same class.

A．cry

B．to cry

C．being crying

D．crying

Eisenmenger综合征（）。

A.肺性发绀

B.心性混合性发绀

C.淤血性发绀

D.缺血性发绀

E.混合性发绀