I don’t know ______ or not the books _____ to the homeless children next month are really useful.
Was it in this hospital _______ she lived for ten years ______ she was trained to be a real nurse.
It was only when the war broke out ______ he began to realize everything was too late.
It was ten years ago ______ we last met in our hometown.
________ their inexperience, they’ve done a good job.
---- Mike, you clean the windows of the classroom this afternoon,_______? ---- But I cleaned them only yesterday.