frightened后面加什么介词

　　Underneath her cool exterior she was really very frightened.

　　她外表冷静，其实内心十分害怕。

　　I'm too frightened to ask him now.

　　现在我吓得不敢问他了。

　　I was frightened by the noise.

　　我被那响声吓坏了。

　　I agreed, but only because I was frightened.

　　我同意了，但只是因为我受到了恐吓。

　　Though badly frightened, she remained outwardly composed.

　　她虽然非常害怕，但表面上依然很镇静。