Her written English is impeccable.

她写的英语无可挑剔。

Fluent in oral and written English.

流利的口头和书面英语。

G. Good verbal and written English.

良好的口头和书面英语。

They are sort of like written English.

它们有点像是书面英语。

Good skill of oral and written English.

较好的英语表达能力(书面的和口头的)。