This is _________orange. That's_________pen. A.a ,a B. an;a C.a;an
.I am not sure ____ . Which of the following is not right?
Do you know if she ____to visit us ?I think she will come if she____ free tomorrow.
Take care! If you lose _______on the swing, you may fall down and hurt yourself.
The rich woman is always ___________her wealth(财富). Nobody is willing to talk with her.
We all found _____useful ______ English aloud every morning.