―What about 10 o’clock tomorrow morning? ―I’m afraid I can’t make it. I _________ then.
It was quite a serious mistake,____caused by carelessness.
I am so glad that I have found the same modern computer____I am working on.
.We should do more such exercises in the future,I think,____we did yesterday.
I have $50, but that isn’t ____ enough for my journey fare.
— You look sad. ____? — Oh, my grandmother’s very ill.