seems strange to us he can sing the English song beautifully.
--- How about going out for a break?--- . We've been working for three hours.
It was announced that only when the terrible disease was under control _____ to return to their homes.
Spelling Bee is a contest _____ competitors, usually children, are asked to spell as many words as possible.
When asked to explain _____ he did to make his students so fascinated with his lessons, the teacher paused and thought deeply.
The subway was crowded with passengers going home from market, most of _____ carrying heavy bags and baskets full of fruit and vegetables they had bought there.