How long have you been studying English?
你学英语多久了?
English is a compulsory subject at this level.
英语在这一级别是必修科目。
Applicants will be expected to have good command of English.
申请人必须精通英语。
It's a common mistake among learners of English.
这是学英语的`人常犯的错误。
If you practise speaking English, you'll soon improve.
只要你练习说英语,很快就会进步。