The question is not easy, so________ students can answer it.

That’s ______ brother’s shirt. It isn’t _______.

It was not until he came back _____ he knew the police were looking for him

Why is it so noisy on the fourth floor—Oh, I forgot to tell you. Many children _______ Ann’s birthday there.

I used to ______ English in the evening. Now I’m used to ______ itin the morning.