在窗体上画 1 个文本框，名称为 Text1，然后编写如下程序：Private Sub Form_Load()Open "d:\temp\dat.txt" For Output As #1Text1.Text = "" End SubPrivate Sub Text1_KeyPress(KeyAscii As Integer) If _________= 13 ThenIf UCase(Text1.Text) = _________ThenClose #1 End Else Write #1, _________Text1.Text = "" End If End If End Sub以上程序的功能是，在D盘temp目录下建立1个名为dat.txt的文件，在文本框中输入字符，每次按回车键（回车符的ASCII码是13）都把当前文本框中的内容写入文件dat.txt，并清除文 本框中的内容；如果输入"END"，则结束程序。请填空。

— You all like your English teacher?

— Yeah, she devotes herself ____ to teaching and it earns her a good reputation. [ ]

A. originally

B. extremely

C. obviously

D. entirely