I won’t pass the exam I work hard.

You ought to have called him yesterday. — Yes, I know I _____. [ ]

下列各组句子中不全含通假字的一项是（ ）

Students are asked to _____ themselves inthis boarding school and they are only allowed to go back home once a week.

Would it be _____ for you to pick me up at four o’clock and take me to the airport? [ ]