When he found nobody there, he was what to do.
There is somebody waiting for you, _________ I think might be one of your classmates.
_________with enough ability for the present job, Mike was not fit for it and he had to quit it.
More and more high-rise buildings have been built in big cities __________ space.
I don’t think the experiment is _________ failure. At least we have gained _________experience for future success.
“Mum, why do you always make me eat an egg every day?” “_____enough protein and nutrition as you are growing up.”