问题

There is ____ “u” and _____ “s” in ____ word “useful”.
A:an ; an ; a
B:a; an ; the
C:an; an ; the
D:an ; a ; the
B:a; an ; the
C:an; an ; the
D:an ; a ; the
正确答案是:
同类题型
It is said that potato chips ____________ by mistake about a hundred years ago.
“We would like some cups of tea, please.” —”_____would you like?” —”Four, please.”[ ]
Each of usreading English books .
How long can I have your dictionary? –it till next term.
This problem is so tough that only______ students can solve it.