问题

There is “u” and “s” in the word “useful”.
A:an, a
B:an, an
C:a, a
D:a, an;
B:an, an
C:a, a
D:a, an;
正确答案是:
同类题型
Mr. Wang, I have trouble ____ the text.—Remember ____ it three times at least.
-Bob failed inthe exam again.-He ________it;he never worked hard.
It is desired that the project________before the end of this month.
Nick, it’s good for you to read some books ______China before you start your trip there.
.The sweater ________ easily; isn’t it suitable for a person as lazy as you?