下列各组字母中全部是元音字母的是 ____。A. a, e, o, r B. a, i, u, e C. o, u, e, n
—Have you finished your work? —No,not yet.I think it’ll take________two hours.
What will happen if he________to the party?
They never work hard because they haven’t known the________of study.
Football is my favorite sport.You’ll never know________I love it.
There are some things you should know if you are________about the exam.