—Hi, Jack, there is ________ useful book on the desk. Whose book is it?— It belongs to my brother.A. a B. an C. the
No matter____, you must keep the school rules.
Sonia will call you if she __________ to go.
------Why are you so upset? ------______I said,they didn’t believe me.
I _______ you a ring if I hear anything.
If you don’t go hiking, ____ I.